I am actually thinking the same, too little output! and its pushing subs all the time month after month! left Canstock a few month back and it seems this is going the same way. Pity because DT used to be really good in credit-sales but its just gone completely dead!  Adobe/FT seems to go the same way

I suspect you have to ask them to delete them all but they will keep selling them for six months or something like that.

This part varies, depending on when you uploaded a photo:

"Contributors are required to keep at least seventy (70%) percent of their portfolio online with Dreamstime.com for a period of at least six (6) months. You may disable all files older than six months from the date of review at any time. You will be allowed to disable a total of thirty (30%) percent of your total Media submitted within the past six (6) months. Media that was disabled and then enabled again will be counted as new submissions, no matter of their original upload date."

You must leave 70% of anything uploaded within the last six months. Then it repeats you can disable 30%.

You go and disable everything over six months, then 30% of anything new. I hope that makes sense?

When I closed my account, the disabled files were still there for quite some time, but NO they don't keep selling disabled files, they just have them in case someone downloaded and you haven't received credit, or if a buyer was planning on downloading. That way the files aren't there one day and vanished the next. I suspect it's about reliability and consistency.

If you noticed you can disable a file and then enable it again. Could be for change of mind or maybe you disabled a file while negotiating some other sale?

Anyway, once I had disabled everything and waited, they sent a final payment, I don't remember but I think that was 30 days after disabling all files.

This is amusing, people have changed keywords and titles to close my account. https://www.dreamstime.com/stock-photography-no-one-image15980522

But here's your answer to the second part: https://www.dreamstime.com/faq2030-how-can-i-delete-my-account

Accounts can be deleted only if you have no activity registered (uploads, downloads, comments,blogs etc). To delete your account, please go to your My Account / Edit profile and scroll down for the Delete account button. Note: the button is visible and can be used only for accounts that fulfill the conditions mentioned above.

Close Your Account here in your profile:

https://www.dreamstime.com/profile then edit profile and from what I saw, there's nothing to close the account? So it must only be visible when you have no files, or I just wrote all this for nothing...