No, the boosting services are probably not actually illegal. Boosting isn't copyright infringement, which is what that passage is about. Generally, companies wouldn't actually go after people unless it's really blatant [i]and[/i] take money (or expected or perceived monies) out of their pocket. That's why Twitch is able to be a thing and they aren't serving cease and desists to about a zillion YouTube accounts per week. Bungie can absolutely perma-ban all parties involved for boosting if they like but probably wouldn't, as even for profit, that's a gray area and not any sort of copyright infringement. Tough to seek criminal or civil penalties and just not worth the effort. It all depends on if they decide it's a big enough fish to fry.