Normally, I would agree with the OP. I mean, so long as a game is advertised as a f2p, it should show some love towards it, because let's face it, as a f2p game (officially) people can assume too much about how "free" it is exactly.
But. With that said. This game has a decent trial model, so I think it should advertised as a free trial (I seriously don't understand why people don't just do this in the first place...), with encouragement to subscribe. The community is decent, and the game really does have a good core mechanic to it. The game is pretty friendly to f2p players as well. Even if you're not on par with paying members, you can still a good few animals, you can still be a trader, if you join a tribe, you can still be an architect. You still have the option to do everything, it's just limited. Which, if it's advertised as a limitless trial, works perfectly. It does the "keep you wanting more" pretty good. I can understand not being able to pay the monthly fee, but if you really like the game, then I suggest trying to find a way to pay for it. You could still play for free, and still have the option to experience everything, or you could pay, work up and be on par with paying members, and be competitive about it. Either way, it's a win-win, depending on your view.