I don't really think that's something to be worried about. Millions of insurance agents are reliant on insurance companies for their revenue - I don't see how this is any different.

As far as just being an affiliate site, you seem to overlook the fact that there is currently no way for consumers to price-compare different insurance companies without going through an agent. This is huge and I'm willing to bet they're hard at work on expanding into the even more lucrative homeowners insurance space as well.