The guidelines to stack exchange say that information that helps answer a question should be posted in the form of an answer, rather than in the form of a comment. The guidelines also indicate that neither answers nor comments should be used to say "Thanks!"
But does that mean that an otherwise constructive answer should be arbitrarily closed because the writer tacks a "Thanks!" onto the end of the answer?
It took all of five seconds for me to edit out the "Thanks!" at the end of this answer to the question: Why does my Nikon D7200 + YN-622 TX have a one second delay when firing a studio flash?
It seems to me that the answer was constructive and told us exactly what the issue was for the user who posted the question. Yet because the answer was summarily closed by a mod, it can't even be nominated for undeletion.