I see that you're planning to sell posters and maps, interesting... Have you managed to speak to anyone, which suggested people would like to buy these?
We didn't have any business plan at all but someone suggested ppl might like posters if they look gorgeous. This idea is outside from our group so thought this could work. Also told some friends who liked the idea although asking friends about this is probably not the best validator.
If there where some interest in the posters we would create customized maps. Your routes vs others' routes.
We are also open for other suggestions :) - Putting stores on the map who can advertise? - Sell the data to governments to use it as an input for cycle route planning?