Hi thais,
Yes a few years back my Reiki partner and I taught a student Reiki I. At the end of the day she tried to sell us some expensive health products which she was involved with, which seemed a bit rude and inappropriate at the time. About a month or so later she approached us and asked us to teach her Reiki II, her motivation was purely and simply to race through the levels, set up business and to make money as a practitioner alongside her health products. Maybe it was very judgemental of me but I politely refused and recommended that she find another teacher. Rightly or wrongly I went with my instincts on this one, I just knew that I wasn't the right teacher for her.
Gentle Blessings
Helen