지난 주말과 최근 5일간 300장의 유사한 컨텐츠라고 사진이 다 거부 됨

"And if it was two years ago, it seems that there may be problems with resolution or new technical issues."

Or it could be because they weren't found using the necessary search terms or there were too many similar images and I lost to the competition. It's all conjecture in any case. I'll grant you, there are many assets that should never have been accepted into the database. People are buying them, returning them, and I assume and hope they being deleted.

I'm not disagreeing with you. It IS more difficult to get assets accepted than it was even four or five months ago, when Adobe first announced it would be rejecting assets that are too similar. New contributors who are just getting their feet in the door are having a more difficult time establishing a solid portfolio. 

As for the 60% approvals compared to 100% rejections, I've been having assets rejected daily for over a week, but then 9 were accepted within a 12-hour period.  It's apparently going to vary from week to week or month to month.