I want to let you know both the transaction to fulluser and the change address was sent to the same exchange/business.
What business is 3FPrgjuzbpiKiBmFFEnJqPCG9PBnSWjXpa associated with? This is your deposit address to somewhere, yes?
I think you were pretending to lend money to yourself.
fulluser is not me and I did not lend money to myself. Both of us use bustabit quite frequently, so that's probably why.