Its more than you will ever need yes. You arent allowed to sell or gift it to anyone but 25g is insane for self use so they basically acknowledge that people will ilegally distribute it, but just wont care if u dont let urself be caught in the act.

It's a lot, but less than most single pot plants will yield (typically 100-200g, but sometimes a lot more), I imagine that might be annoying for people who grow their own, but then again I don't see how it can really be enforced.