buying qi is pretty much buying 'experience' in order to attain certain items
the way I view it....it defeats the purpose of the game
the whole purpose of qi was to give the players who have played many games certain special items that would set them apart and stand out from other users. So its almost like cheating, but its allowed unfortunatly
Nabi discourages the purchase of Qi, and points towards Qi boosters. I do believe they still accept people buying Qi though. I guess it depends. The thing that it depends on I really have no idea though.
However, know this, if you buy it, people will probably hate you. Just a warning.