Just to clear my doubt Please let me know
Is asking for a feedback is wrong??
You answer may be helpful and give me more information about the forum
I think no, you are free to ask a feedback as long as you have made deal with them and they willing to give you a feedback.
And You are free to give positive feedback to someone who has made deal with you as long as you trust them and that account is not your alt. It's better if you had reference link. The reference link means that the deal is in public.