If you use HTML in your gallery upload comments, make sure you aren't using it to give credit to merchants and/or freebie creators, even if said products are available here.  Apparently that's against the rules. If you want to give credit for things, you have to use the built in credit feature when you are uploading.  So far as giving credit to freebie creators and merchants on other sites,  and such, you can only list a name and mention the name of the site it's found, but you can't link to it.

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi