My first thought is: This is a great way to get their attention. If you've been surreptitiously flying under the radar up until now, I think that stage is long gone. On the flip side, maybe instead of shutting you down, they should acquire you and then shut you down. That's a win-win, right?
Why would they acquire him when they could shut him down and replicate the service? It's not like they have much of a reputation to maintain. He doesn't have extremely significant traction (otherwise they would have done something by now) and AFAICT he doesn't hold any patents. To clarify: I don't mean to disparage him, but acquisitions have to bring some sort of value to the acquirer.
The value could well be in the person they pick up rather than his product (or there could well be bits of the product that are genuinely useful to them, and a potentially interesting customer base)
