If you play Summoning Portal into Mechwarper, you are able to play Sn1p-Sn4p for 0 mana.
Normal players can play Sn1p-Sn4p 25 times a turn (limited cause of the animations).
Some players have disabled the animations with third-party tools and are now able to play over 60 Sn1p-Sn4ps a turn.
Mid-July over 100 Players got banned for doing this. (Source)
Ban without a reason
On September 16 the Wild Player Eddetektor got banned, in his Reddit post he says he did nothing wrong, the reason is that due to a bug he was able to play up to 30 Sn1p-Sn4ps a turn. His post is one of the highest voted ones in history, showing that both the deck itself and the way people get banned in hearthstone is very controversial.
Today a Community Manger posted that several players have been unbanned, Blizzard was not aware of the extended time situation (Source).
The Wild Community is thinking now a lot how Hearthstone should deal with this situation:
- Should Sn1p-Sn4p be nerfed?
- Should Sn1p-Sn4p (Echo cards in general) get a limit?
- Should the Interaction with Summoning Portal into Mechwarper be changed?