SimsHost has been arond forever, sadly, I'm sure not unlike TSR, EA have noticed them and chosen to do nothing...
Despite its obnoxious micropayment system, SimsHost is no different than any other ignored paysite.
EA has to be officially, plausibly aware of a violation before they can (legally) be expected to react. The internet is a big place, and SimsHost is so under the radar it might as well be grounded.
TSR, however...EA can't deny knowing about them.
They could still claim to be charging for bandwidth and the service under the old rotation system (though that's a lot of definition stretching, and wouldn't hold up in court.) But once they locked off content and started seriously headhunting creators, TSR became a .package store.
This will force EA's hand. It should be interesting to see how it plays out.
My money is on TSR "seeing the light" and switching back to the old system, after a quiet (polite) ultimatum from EA.