AMA could be really fun, maybe in a few weeks.
Glad you are considering my suggestion, however I hope that getting merit isn't actually the main reason why you are creating it.
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Honestly it could be both at the same time and I wouldn't care. As long as we get a good participation and get questions answered, the motive could be merits and all I care that I get a good straight answer and I am fine. Dude deserves some merits for answer questions, the more you answer the more you would get, it is only natural and I do not mind it.
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He is doing it because he isn't forced to do so, he has leisure time to answer tons of questions, and of course, he enjoys it more than earning merits.