Gee, I withdraw from coin games fairly often, but it's usually because I've received an invite from a friend to play a ranked multiplayer round.
Coin games are really just a sad joke, not much more to me than a way to pass the time when I can't find a multiplayer ranked round. Coin games are by far the most overtly manipulated format on WGT, especially when there's a large disparity in the opponents' tiers, and, as a result, sandbagging runs rampant. If the morons-in-charge think so little of the format and the folks who play it to allow (and encourage) this to happen, it seems silly to expect the players to show anything other than a similar level of respect for it, either.
coin games are about skill over time. tier means very little.
Someone with skill will get out of the lower coin games and progress into the higher ones.
On any given night there are 6-20 people in Tokyo. And in general it's the same 100 people on a rotation.
The coin rooms are basically a sorting mechanism. The only reason for a high tier legend and above to be in the lower coin rooms is because they can't really compete at the higher levels so they go broke on silver coins. So if you're playing some higher tier in a lower coin room. It's likely they suck.
Exceptions can be showdowns. where the vets are forced into Casablanca and the experts are in Montreal. Maybe someone knocking out their daily in Rio or the lowest one hole room.
But as i said over time the coin rooms basically indicate skill level. crappy players or beginners in the lower rooms.