I suppose the feedback can be changed to merit farming with a "friend" if you prefer.
Is it against the rules? sending merit for a valuable post by other member? sending a
couple of merit(than 10 to 20+ by other member) to a known person can be considered as farming? funny
Scamming isn't against the rules. Selling accounts isn't against the rules, but both are frowned upon by the community and will get you negative feedback. Giving merit to your alt defeats the purpose of merit in the first place and of course will be incredibly biased. You could have used that merit to give to somebody elses worthwhile post but instead you selfishness gave it to your alt - sorry, friend.