The tiny, hardly visible/recognizable source was added at the bottom of the post after the art fraud was detected.
We don't believe in such stories about "forgetting" to add the source.

The art in that post was plagiarised. It is serious abuse.

Posting that art without the source was intentional. You carefully selected curated art tags for it. You exactly knew what tags to hit.
Even if you added this tiny source at the bottom, why would you think that effortless copying and pasting deserves to be monetized?
You are not new around so you know well what is considered abuse.

The wording in that post was an intentional attempt to mislead the community that you have drawn the art.