I don't know your specific circumstances but perhaps your group can coexist with this gentleman's targeting different recipients. If the earn-a-bike model is what you want to invest in with your time and resources and someone else is "giving away" bikes - how do they pay for the parts/consumables necessary to restore bikes? Are they also working in a non-profit or are they paying for everything themselves? Could they be brought into your model if it were explained how there is more than a bike that is being "given". I hope that he will be able to listen to why the earn-a-bike model has much more social impact through teaching and the recipients "owning" the bike through work and how it is a shared experience. There is also the parable of giving fish versus teaching someone how to fish...
Good luck and let me know how it went,
Project Bike Tech Teacher - Aptos High School