Пришёл ответ по поводу удаления портфолио:
You can disable all files approved more than six months ago at any time. You are allowed to disable 30% of files approved in the recent six months, however 70% must be kept online for six months from their approval date. You can disable each of your remaining 70% after the six months pass.
To disable files, please go to My Account/Online files:
http://www.dreamstime.com/onlinefiles.php , edit the images. On the following page scroll down and click the trashcan button to delete the image.
Once you no longer have images online, you can suspend the account from the public site from My Account/Edit Profile button.
В общем, я могу вручную удалить 30% портфолио, остальные нельзя ещё полгода. Лучше было вообще туда ничего не грузить)