[Guvante]

Honestly it can be quite difficult, generally speaking the best you can do is release the data in raw machine readable format with a permissive license.

Unless you already have large interested parties "bribing" (not technically of course) the group of controlling members tends to be a weakness of anything crowd sourced.

Especially since it is rarely cut and dry. If the finances aren't working out is it better to sell and keep the site online or not? Are intrusive pop ups begging for donations a better option? There isn't a singular true best option.