[Supreme Sven]

Hey there. I have built up a lot of airline miles and was wondering if I could sale discounted flights by booking flights for people with my points?

No blackhat involved. Can prove it. Just been flying a long time and need some cash.

[Meowth]

This should not be a problem unless if it pertains to fraud or blackhat activity in any way. The only issue here is finding someone who will trust using your personal account to book their flight.

Best.

[Frost Crypt]

I don't personally see any problem with that but is probably hard to have someone to trust you with their vacantion thinking they might be left hanging on the airport. But maybe they are some kind of validators online.