MattK1917: credits for playing against someone instead of coins
That won't ever happen. There won't ever be any way, other than gifting (unless TG/WGT gets some common sense and limits or stops that part of lost revenue) on the mobile platform. 100% guarantee it.
WGT has said several times they won't allow it because of the potential for it's "abuse". Some of the no-life, low-life idiots of the world already abuse the coin rooms!! A trillion coins won't get you squat, so they have to be morons to be abusing it and racking up coins.
I played the coin rooms for a few days only to get an outfit for my mobile avatar.
Anyway......I'll bet you 1,000,000 coins that WGT will never allow any type of gambling between players (MP, skins, blitz) on mobile, which is a very good thing.