I'm in charge of the Amara help forum. So far, none ot the topics marked as spam by the filter were actually spam. The spam issue is rather with tickets, because they can be created by hst sending an email to some @amara.org addresses, whereas in order to post on the forum, you have to create an ID.
Thanks for opting to post this on our forums section. We have a spam check tool that checks for the posts' spam score and then mark them as SPAM or send it to approval based on the account setting.Here's an article that gives you more insight on the forum moderation workflow :