I noticed a few days ago how complicated it is to upload images to Dreamstime, and the model release management... I couldn't believe it's for real. Now considering that it takes 10 times more time and effort to upload to this site, at least for me, I think it would make sense to just leave it out completely. Does it make sense financially?

SS has the best batch editor. It's the best way if you have to choose categories. It's even better if there are no categories to choose, but only newer (and smaller) agencies have evolved so far. FT OTOH is just terrible, you have to finish the UL process one by one, attach MRs one by one, even click to add IPTC data. I'd say only IS is worse, because of the CV, log outs etc. DP is good, but you still have to choose categories and finish the process one by on. CS is best, I think, only upload, attach the MRs via the MR manager and that's it. But sites like DP, CS are a loss of time (even though they consume less time than most sites), the return is just pathetic 1-2% of SS makes. So I dropped them all