The monetization plan is already there (in details), it's just that we don't want to spend time coding it if we don't have the required traction. Hope this makes more sense?
We did a group chat product at groupflier.com and got great traction on the free version but the SMS costs killed us and we had to switch to a paid model. Happy to trade PM on our experiences if you are interested and have a blog about it at:
They're not talking about the details of the plan, though. They're encouraging you to empirically test your belief that people will behave the way your business plan is expecting them to (paying you for whatever the service is, sticking around when you monetize them with ads, or whatever it is.)
