Perceived fairness in micro transactions

I am currently working on my masters thesis on the perceived fairness of micro transactions in online multiplayer games.

My aim is to conduct interviews with players and examine their opinions on the specific game’s micro transaction system. However, I am having a hard time finding respondents and was wondering if anyone in here knew where to find them?

Currently I am not locked down on the specific game, but only that it has to have a dual currency system (as for example in Puzzle Pirates or Combat Arms).

Great blog btw!

Cheers
Daniel