In the case of evite, yes they rely on advertising, but remember they are owned by IAC (also ASK.com) which allows them to cross-sell, and they do have their ow

In the case of evite, yes they rely on advertising, but remember they are owned by IAC (also ASK.com) which allows them to cross-sell, and they do have their own ad sales team. In your case, I don't think I'd follow their path. They suck, and there are other better products, but evite has momentum from '98. It would help if you'd be more specific about your utility, where you are located, and where your target market is located because these factors are major when considering monetization strategies.