Hello. I upload to DT and other acencies for a year now. I don't have a professional port and i do it for fun. But, if i look at the stats from the pool, it's clear i have a problem at DT.
   Someone opened a topic about sales/port at SS, and i saw my sales are like many others. So  my images are low sellers, but match with the others that don't shoot professional but only for fun. But at DT,t hey are pathetic, and the numbers are not growing at all. I wonder if it's worth uploading other pictures. Probably it isn't.
   my stats are:
   febr2012       34 pics   1 sale
   march2012    67pics    2 sales
   april2012      103pics   1sale
   may2012      142pics  3sales
   june2012      184pics     0
   july2012       200pics     0
   aug2012       242pics  2sales
   sept2012      307pics  6sales
   oct2012        375pics  6sales
   nov2012       447pics  6sales
   dec2012       515pics  8sales
   ian2013        594pics 7sales
   febr2013       676pics 6sales
   
   Now i have 717pics and so far 3 sales this month. This way. i'll reach payment after 3 years, when i will have probably 2000pics or more. I find it very weird. My acceptance ratio grew up steady at DT, and they have a graph for exposure, witch is  growing also. Two weeks ago i had a file chosen for editors  choice, and it is having lots of views, but 0 dlds.
   At SS and FT the sales are growing with the port, IS was my best for the first 6 months, it's going down, but that's not weird.
   Maybe you can help, maybe i made some mistakes at DT. Thanks

Having an image as editors choice doesn't mean sales.  I had an Editor's choice image that never sold and was recently deleted by DT as being a non seller. 

     Now i have 717pics and so far 3 sales this month.

You're describing my February to a "T". 4 sales with approx. 750 images. I actually wrote DT Support to ask them if there could be a problem with their "sales tabulation system". They assured me everything was fine.

March is better. Nothing to write home about but at least back to regular daily sales.

   No matter how non-cmmercial are my files, a 700 port must sell better than a 300 port. And they are selling on SS and FT. So must be something with DT.

hmm, except my 300 port outsells yours.

My uploads to DT the past month or so have been mostly rejected so I am not bothering at present as the same pics rejecte dby them are accepted at SS and other. Very disappointing as the sales are also abysmal at DT- what is going wrong?

  I don't have a professional port and i do it for fun.

In my opinion DT seem more than anywhere else to  reward consistently good portfolios in the search.

   Vannphoto, I was reffering to my own files. I sell now the same as when I had 300 files. I was not reffering to another port of 300.

ah. I see your point. and given that DT doesn't allow similars your port of 700 is more versatile than anywhere else?

It's a sad thought that I could double my port at DT and not see much difference in sales.

   Vannphoto, I said that my sales are now the same as when I had 300 files at DT. So with 700 files I sell the same (almost nothing) as when I had 300, some months ago. And that's weird. I didn't compare my port with others.

They are not consistent but usually my #2, volumes lower than SS / FT but RPD much better and very occasionally can match SS in $ - this month they are ahead of SS for me.

The whole pace of activity there seems slow.  I uploaded some photos 4 days ago, they still show an estimated 5+ days until review.   Meanwhile they're nibbling at my old,  unsold photos with automatic deactivations.  They recently dumped one that had brought me an EL at SS about 2 days earlier.  The photos they're deleting are niche subjects which were only expected to sell once in a while, which they do on SS, but I guess DT doesn't want those sales and would rather get new business handshakes.

Why not put your niche photos on Alamy?

Actually I have, and I am getting a sale there every now and then.  But the prices aren't anything like $400.  My most recent were $24 - I got $12.

I have found my sales numbers at DT to be pretty consistent over time.  Recently though, more of them have been subs and fewer OD, which has affected the monthly $ totals. 

Still, for me they are holding up MUCH better than Istock and Fotolia, where I have seen extreme drops. 

$2.64 rpd is very good! Thus tells me quality is top notch...