No, people also take all their files off agencies if the agencies behave in a way which they can't stomach. You'll have to read up on this for yourself nd make up your own mind.

Some sites you can upload your photos to could sit there for years and the sales are so few and in between, it could be years before you even see a payout. Many of these...actually almost all of them...don't do automatic payouts. You have to constantly check to see if there are any sales and if you have reached payout then request payment. I'm sure a lot of these stock agencies are sitting on a lot of money because so many contributors give up and leave there photos there and never check back because of lack of sales.

As far as the talk of withdrawing ports from some stock sites...it has to do with the treatment of these stock sites towards their contributors. Reducing the pay all the way to giving away photos for free without the contributors knowing about it until after the fact. I guess I would say it was a decision on principals by a lot of the contributors, me being one. I use to be on about 10 different stock sites...now I am only on one and it is far easier only having to spend a few hours uploading to one than it is to upload to 10 different ones that take two days to do and didn't yield much return.

Like ShadySue said you need to do the research and make your own decision on that.

if it's not exclusive why don't u put your work in as many as you can to generate more profits anyway people dose not work with all of them at once so diffrent clients diffrent potential of sales

Not everyone who sets up a storefront is a good partner for your business.

Personally, try the all the companies and after one year see which ones you like and narrow it down. Some folks do very well on sites that I cannot even get one sale so you never know until you try...

It's about control of your work as much as anything else - who sells it, at what price; can you delete the image yourself at a moment's notice; do you trust the agency (and any employees/contractors) with your full resolution unwatermarked images; do they pay out on time.

If you view your images as having value (something clearly demonstrated if you've been selling stock for a few years and making money), you don't just hand them over randomly to anyone calling themselves an agency.

You can read on MSG about some of the agencies that have come and gone over the last decade. You can read a recent trainwreck when DepositPhotos allowed a "partner" - who they said was using the reseller API and thus not really a partner - to sell for high per image prices and pay the image owner a subscription royalty.

All agencies are not equal. Be careful about who you decide to do business with. Read the contributor agreement and license terms before uploading.