Well, for me it was a bit to focused on visual programming, as I actually do know quite some programming languages and feel more comfortable with a full language.
But it has great tutorials, everything you create is yours, the full engine is Foss and it is very capable. I think it is the ideal engine for beginners, I remember thinking that I wished it was around when I was just starting out :).
The only paid stuff is if you want to use their online services (for hosting your game or leaderboards) and some assets are also for sale I guess (but this is the same in almost any other engine, e.g. unity asset store or Unreal). So no paywall in my opinion, again, the full engine is MIT licensed.