If they feel like keeping the models to themselves, I think it's a fair game. I give them observations, they gave me the id service for free. Maybe they even sell the models to fund their development efforts? I wouldn't mind... they need to fund their functions somehow anyway.
And remember, their observation databases are open. In fact my observations are automatically copied to the databases of a national biodiversity institution (which is open as well, except for some critical species).
Institutions need to maintain themselves and be able to pay their employees for them being able to feed their kids, etc.