Scummy if it wasn’t agreed on before hand. But if you kick him then you’ll just be sitting around for 30+ minutes waiting to replace him since no one wants to tank for pugs.
In general I am ok with tanks charging for their services it is a good way to incentivize tanks who may already have all the gear they need from dungeons
Yeah, not bringing this up beforehand is absolutely a dick move (also I would say over priced).
If a tank is going to charge to tank they should not get any loot from the dungeon
Only pay half upfront. he could be #_&- that bails half way through, or he might just plain suck at tanking and need to be replaced (on the other hand if you made a good faith agreement to pay a tank, and your do not replace him refusing to pay at the end is also a dick move