Placed's Affiliate program allows developers to monetize their applications without ads. Developers get their users to opt-in to supply their location information for research purposes, Darrell Etherington writes. Placed will pay developers based on the volume of location information generated by an app's user base over a seven-day or 30-day period. The opt-in rate is high so far. "This is something brand new that doesn't impact your in-app experience at all," CEO David Shim says.