I have no clue what's up, honestly.
I'd like to know, but there's no way.

Now, 150k users login per day, so that's quite a bit. Let's assume 2% of them use MBAM, so that's 3000 users.

I'm not sure how many users could be using their premium feature, but I'm assuming that not many of those let's say 3k users.

Please add FH to the trusted list if you'd like to access FH.

If there was something wrong with the site, I believe all reputable AVs would pick it up.