Agreed. The whole point of a 'free trial' is to give someone long enough using your product that they can't live without it and they have to pay you for more.

Agreed. The whole point of a 'free trial' is to give someone long enough using your product that they can't live without it and they have to pay you for more. It might take some people 2 hours to get to that point and it might take other people 6 months to get to that point. However, it also depends on if giving out the free trial costs you anything - you might not be able to afford to give your product away for 6 months (or longer). I personally think it's a good idea to design a free tier into any product, and design it very carefully so that it costs you as little as possible to give away.