They are never implemented consistently and every site has its own rules.  What is difficult is when they raise the standards with no reason.  Example picture of Bougainvillea.  Prior photos of bougainvilleas accepted with no problem. flower rejected because wrong title.  Reviewer sees foreign word and rejects.  Finally able to get it approved by specifically stating the scientific name is.

Recent rejection of Apotheosis in US Capitol as non licensable content.  Painting done in 1800s in a public building and is clearly in the public domain.

Many other sites have already accepted the photos but SS has decided to arbitrarily reject it.

All signs that SS has decided to reject more photos and that is not a good sign.

Have had ok sales with Age.  The good point is that when you get a sale return is better than MicrostockGroup per sale.

Easy to upload so keep on uploading.

Talked to canstock at one point because they wanted a property release for the White House?

Told me that their lawyers were requiring it.

I am a lawyer and have done copyright work and could not figure out how they needed a property release for the White House.  Lousy legal advice means more rejections.  Think that is the real explanation as to why they are rejecting so much and also have low sales.