This spooks me a bit. I'm a big fan of Chargify, but for their prices to jump like this and totally remove the free plan is scary. That will make it much less attractive to brand new web apps that don't have a proven business model.

With the new pricing scheme your setup cost for accepting credit cards are merchant account, gateway (ie. Authorize.net), and $99/mo for Chargify. For most brand new web apps that's going to be significantly more than you pay for server/hosting costs. That's a bitter pill to swallow when you're not even sure if anyone will actually pay for your service.