Terms for subject Meaning 3 containing A,A,A,A

English	Russian
as a compliment	просто так (от себя, в качестве подарка или доброго жеста 4uzhoj)
as a gift	просто так (4uzhoj)
just for a thank you	просто так (не требуя ничего взамен: It's nice to see people doing something just for a "thank you" and not for money. Alexander Demidov)