It's exactly what it says, no strings, no promotion, you don't even need to thank me.
I've won around $80 bucks in the last few days on the roulette thing at gain (I almost lost $50 before winning $70 so be careful). I deposited $80 to my Amazon balance last night and another $40 today.
I don't want anything in return, this is just my way of being kind and paying it forward.
I hope this is allowed and doesn't get me banned or anything. I didn't see anything in the rules to make me think otherwise.