You understand the message wrongly, OP tried to extort 1xbit --which, ironically, is the lesser of two evils on this case-- by asking for 1btc in exchange of OP deleting his post and give full access of his account to 1xbit, not offering.

The ulterior motive has also been nicely explained by OP on his second message, namely gathering customer's login details and funds confiscated,



Not sure how that'll scare 1xbit, given the best OP can do with the details he got is compiling a list of the victims and the total sum scammed, which would just further paint 1xbit one or two shades darker on their already vantablack reputation, where it's also quite established here that they couldn't care less about.