HeroesLAND is another “online heroes” game.

I apologize for the late response.
1. No, I don't think so. Simply sharing a link isn't enough, you'll agree. And practice confirms that there are no significant advantages to be gained.
2. This is at least prohibited by the rules. And it is actively monitored by us and by the players themselves, as all battle logs and the movement of valuables in the game are publicly available.