I agree completely with your post. I've never been compelled to use Foursquare, but have observed friends who were into the original check-in idea gradually pull away because of the force-feeding.

B2C is hard to monetize, period. The Groupon collapse sort of shut one possible revenue door for Foursquare. Twitter can pull off ads because it has a big brand draw that Foursquare just doesn't.

I respect the team, but I don't envy their position.