I wonder why are many advices in this topic don't consider the relationship between the OP and his users.
That trust has a value, and OP should ever destroy it.
I can't be the only one who clicks on the developer's name in the app store to see what else they have available when the app I am using from them is good and free. If I get a good free app I'll be more likely to pay for the next one.
OP should think long term, he is a developer by trade, a quick buck now isn't a smart move imo.
I wonder why are many advices in this topic don't consider the relationship between the OP and his users. That trust has a value, and OP should ever destroy it.