1$+ per picture is quite expensive for image storage. It will probably be used mostly for blackmailing and CP
That is what the dark web is for, makes no sense to blackmail someone on the block chain as it is publicly visible and it would already be out there forever.
Anything that is not possible to censor or redact has that feature, even our comments now, everyone can put out threats, blackmail if they want to in plain text.
It would be easier to just put the SHA256 hash of the file as proof of existence, it is already possible to write any data to the BlockChain or any other storage system online.