I can't help but wonder if it is a bit of a backdoor, data-mining freebie.
It requires an account, so...yes.
Companies you like trying to sell you stuff isn't the worst thing in the world. It still gets annoying after a while, especially when everybody and their goldfish releases a video whenever they release a product too. Though...I guess that doesn't happen with plugins as much. It's almost like people don't care as much about them.
As to the OP, I'm a huge fan of Pro-C2 and FirComp for general compression duties. For mastering, I like Unisum. The control it gives is on another level from basically every other wide-band compressor.