Having 3 mines makes the game more interesting, but also more frustrating, and more ragequitting doesn't help our player numbers.
I think 2 would be a good balance, but what about everyone else?
Even with 3 you see people getting killed by 3 mines at the same time, 50 would be brutal. Maybe in chaos mode though.
How about 2.5? That's a nice compromise.
Honestly I think the amount of mines you can place should be related to the size of the map or to the amount of players on your team. Or make a team mine pool. For example, blue team has a total of 10 mines that they can share. They cannot place any more mines once the limit for the team is reached, and if wanted to place one they would have to ask their teammate to remove one that they had placed.
I really like the current 3 mines thing. If you tnt train you never get mined.
I like 2, but 3 isn't too bad.
Personally based on my experience so far 3 mines per-opponent just seems like too much to keep track of. I decreases action by a lot. I would say 2 is a good balance.