Free but do a survey mmm
Why don't you just sell it for a couple of bucks? It would be fairer because anyone could buy it then. Surveys aren't available to all and some (me included) don't do them, it's like inviting spammers. You'd get the money quicker too, I don't know how many months you have to await payment from CPALead but PayPal is quicker, you'd have it in seconds.
What would be the cost to buy it? (Obviously a special discount price to NB members of course )