Another word for ad is promotion. These sites promote certain groups. The censor believes they profit from this activity. It is not unreasonable for such a censor to understand them as illegal ads.

I’m assuming that’s an effort to mask the true intent.

Or the intent is something other than what the report assumes?

Just to be clear; the (incomplete) code snippets in the report have been through a code mangler. The only names readable are of the api that is actually used.