So, we are talking about 'lite' software (that's what the author of the blog post wanted to say), combined with refunds? It seems like a perfect treat to me, but you have to give people a limited time of refunding, say, 6 months? If you give them unlimited time, you could, for example, buy Total Uninstall now, and in a year, ask for a refund, and use the money to buy PowerTools 2008 (that's why I considering if I should buy TU3 or stick to version 2 waiting for PowerTools...)
Anyway, that's not the point. A good (and different) approach could be something like this: lite versions of the software, with noncritical features disabled (to prevent Zaine getting bold due to crippled software usage

) with a money back guarantee for a couple months. Someone wants to try this approach in his/her own software?