Also, just based on the position on the page of your product offering and some language you used, I think you desperately need someone to give you permission to make money in return for the value you have created. I struggled with this six years ago. So, karmic balance: it is totally OK for you to make money. You can put a prominent buy link near the top and write sales copy that doesn't sound like you think you are cheating people. It's OK! Folks buy stuff all the time! We like buying stuff! Also, many of the folks buying this will be business users. Even the least sophisticated businesses are systems which turn money into money by buying things, most of which will not make money into money nearly as nicely as your software will.