For me, DT is my second highest earner.   Sales have been holding steady, but I've noticed that RPD has been steadily falling for the past two years.

I'd say FT is the one dying.  They used to be my #2, and now they're #4.  (#3 is 123RF, and we all know who #1 is.) 

I'm not up for sharing the numbers, but here's my DT graph, October 2004 to now (the flatline in the middle is when I was exclusive at iStock)

I'm still seeing annual growth but only in small increments - nothing like SS or FT.

DT has always felt like some sort of photo club that happens to sell pictures and has long been outmaneuvered by the rest of the top 4. Even the name, Dreamstime is pony. Or it could be that I have, on average, between 800 and 1,200 fewer files uploaded there thanks to their rotten "similars" policy.

I'm not up for sharing the numbers, but here's my DT graph, October 2004 to now (the flatline in the middle is when I was exclusive at iStock)

Well your graph as a whole looks like mine, so it's not just me I suspect.  I refuse to upload video there to enhance my income due to their crummy video commissions. Really, though, I think it is the same with most agencies. SS, for example, is growing in terms of revenue but declining in terms of number of downloads.  It's the OD's, SOD's and video sales that give me cyclic bumps in income. Without those SS would be like any other agency. On DT my last 30 sales are 35 cents, then $2, then $2 again, then 25 35 centers. DT is probably pushing subs because my credit sales are almost non-existent. DT may be able to survive this way nicely, but the contributor loses big time. They will soon be supported by college students who make $25 a month and they will be giddy with that much.

Well if they are still around I estimate I could make the payout threshold by around 2017. It's that bad.

While not in the same league as Shutterstock, DT still does fairly well for me and I take several payouts each year.  This is probably due to a relatively large number of individual sales in the $5 to $10 range each month, along with the usual $0.35 subscription sales and an occasional EL.  So are they dying ... not so far as I am concerned.

I was surprised at how many sub sales I get there.  It's just like SS, essentially.  But a lot slower.

It's been mentioned before, but it goes in waves I have some pages of 20 sales where 1/20 is a credit sale and then some where 9/20 are credit sales.

Now DT has done away with more money for subscriptions of level 5 images, the only variation in subs is when the $2 royalty ones show up.

However, after you've been there a while (I think you only recently started uploading there) and have a decent number of level 4 and 5 images, the credit sales when they happen produce better royalties - two recent credit sales on level 5 images produced $7.61 royalty for the medium size, and a level 4 extra large $8.31

I'm still thinking DT's pricing is way too complicated (which has hurt volume there) and that they don't have the bonanza of $75+ royalties of SS SOD sales to make up for the many subscriptions.

I too experience a decline in DT sales, but I wouldn't say they're dying. They may still have enough profits, or they can cut costs to survive a little longer. Smaller agencies, on the other hand, may succumb first. Although the smaller companies have less costs to run their business.

I've read posts like this long enough to know that different contributors have different experiences. One person's sales have "dropped off a cliff", while someone else's is "best month ever". Perhaps due to the types of images people are producing and buyers are looking for at a particular time.

That said, the reason I took a look at the Dreamstime board is to see if there was a post like this, because my sales have dwindled to almost nothing. (ok...so $0.35 a week isn't exactly nothing.) So, my perception matches others here.

One thing I like to do from time to time is to drop in on the agencies I upload to (SS, DT, BS, & FT), type in main keywords from one of MY images and see what kind of a job their SE does in finding it. Over the past half year or so, I have been unable to find many of my own images using this process on DT. If I can't find my own image, using my own keywords in the meta, how can a buyer?
And don't get me started on their 2 week review process. That may be an indication that they don't have sufficient funds to hire enough reviewers.

 It does make one wonder.

Well, I haven't uploaded to DT for over a month; but my returns on SS and FT still make it worthwhile.
Which makes DT even sadder, since (except for this month) I've uploaded the same images to all.
At this time, I don't see any downside to leaving the DT account open and see what happens.
Hope springs eternal....and I believe in Santy Claus.

Funny how we're all so different. DT is far and away my worst performer (my other agencies are SS/IS/BS/FT) and the only reason I haven't dumped DT already is that they don't yet have my full port... I've been working through submitting a backlog of 400-or-so images that are already live with my other agencies, and I thought I should let them run with my full port for a while before making my mind up.

As a rough estimate, DT sales are running at about 1-2% of SS sales for me.