A few more words might help.  If you're asking how to get a photo of someone with tattoos accepted, you will need to submit a property release signed by the tattoo artist.  The artists holds copyright to their art, and needs to grant permission for its commercial use.  That is of course in addition to a model release.

I've uploaded via FTP just about every day with no problems at all.

Yes, payment arrived on schedule on the 14th.  As far as I know, minimum payment hasn't changed.

Safari don't work either.

It's working for me.  Left coast of the US.

I've been submitting pretty regularly via FTP.  No problems to speak of.

Add me to the dumpee list.  Exactly the same list of reasons for my dismissal as Phillip Minnis.  I joined in May of 2011, have/had 14,000 photos on the site and earned thousands of dollars for them and for me.  (More for them, of course.)  I'm just over a dollar away from a payout.  I certainly expect them to pay me what they owe, assuming I don't hit the minimum before the great purge.

I received one as well.  It corresponded to the last few sales at Veer after they sent me my outstanding balance but before they shut down completely.

It's advisable to have a release for each shoot.  The EXIF data in the image files contain the dates they were shot, assuming of course you set it correctly in your camera (and haven't modified it later).  Most of the agencies (all but iStock?) require only a single release for each model to be uploaded, but having the paperwork could save you a lot of legal trouble down the line.

Fashion is not subject to copyright protection, which is why there's such a good (and legal) market in knockoffs of designer clothing.  It's also why many designers include their logos on their designs.  Just have your models wear clothing that's free of logos and other copyright-protected graphics and clone out the ones that slip by you and you'll mostly be okay.  I've never had a rejection for clothing, other than a logo or graphic I missed.  Jewelry is generally the same story, aside from obvious trademark issues like the Playboy bunny on a necklace.

You'll need an FTP application.  Most any one will do; GUI apps are easier but you can use a command window to run the ftp command.  I'm on a Mac; I use Transmit when I want a GUI or use the Terminal for command-based FTP when I want to script my process.  I'll let Windows users suggest apps on that side.

With such small numbers, it doesn't matter whether you submit all at once or in little batches.  As to whether microstock is worth it to you, it depends a lot on what you hope to get from it.  When I started I made almost nothing; it took months before I reached double digits of dollars.  But I learned a lot, both in terms of improving my basic technique and in figuring out what had a chance of being accepted and what might sell.  That education kept me going for quite a while, long before my sales were anything to write home about.  If that's true for you, and if you have a thick enough skin to deal with regular rejections as you learn, you might find value even if the money isn't significant.  And who knows?  You might be a big success.  It does happen, even if it's less common than when a lot of us started.

Canstock implemented a new contributor website a few months ago.  My first reaction was annoyance at some removed capabilities around releases, but that's turned to fury at their sheer incompetence.  Here's my problem:

I had a request from a model to remove her images. Never mind why; her reasons were personal and I decided to accede to her request.  So I looked for an easy way to locate her images.  I noted that the release page has a count of images tied to each release, but sadly no way to actually get to those images.  So I did it the hard way, which in my case meant locating them manually among more than 400 pages of images.  Okay, annoying but not a big deal.

Except it isn't so simple.  First, the links to move among pages only permits moving to the next page or the one after, which gets old when you need to move ahead by more than 100 pages.  And then I ran afoul of some major bug, where before I can get to the page I need, my page forward request freezes around the same place every time.

Bugs happen, but here's where poor design makes things infinitely worse.  Old style web pages use URLs to navigate.  That's good because they can use parameters within the URL to indicate where to go.  If there's a parameter for page number (or image number for that matter), it's easy to edit the URL to move ahead an arbitrary number of pages.  Shutterstock, Dreamstime and others do it that way and make navigation easy.

A more modern approach to web content is called Ajax.  It uses Javascript to permit content to be updated in place.  Instead of going to a new web page, the current page replaces one set of content with new stuff.  In theory it's a cleaner and potentially more efficient design.  Except that you lose any ability to override parameters and skip a bunch of content you don't need to see.  Or to go back to a page and try again, like when there's a bug that keeps a particular page from loading.  Or to use the Control key to open a new tab or window for new content.  In essence, you lose a lot of the benefits of a web interface.  And if you're stuck because of a bug, your only option is to go back to the beginning and hope against hope that it won't fail this time.  Which it does, every time I've tried it for a couple of weeks now.

I put in a support request before the New Year.  Still waiting for anything beyond an automated acknowledgement.

I think the op is probably struggling with contrast.  ND filters don't help much with that.  It doesn't help that the op hasn't told us what the actual problem is.

I think you've nailed it.  There's a reason most of us avoid shooting at noon.  However many stops of dynamic range your camera may capture, at midday it's probably not enough.  The highlights are too bright and the shadows are too dark, so you lose detail at one end or the other or likely both.  And even if the camera can capture it, the data format you use may be too limited.

Noon is a good time to take a nap, not so much to shoot stills or video.  Especially in bright, sunny places.