[KabaKun]

I wouldn't worry about it. It's generally not something that gets noticed.

This probably got noticed because it set off some automatic warning that caused someone to look into it.

Three 500 rep bounties awarded to a single user in two minutes to answers that were from 2015 is a bit unusual. Users can only offer 3 bounties at a time and the maximum value for each is 500 rep.

The reputation history for the account can be seen here - https://stackoverflow.com/users/4616250/user4616250?tab=repu...

Opening the December 10th and 11th sections shows 1590 reputation was removed - that's 1500 for bounties and 9 upvotes, some on the same posts. Three of the votes on the 10th were within the same minute with one two minutes later - that's not much time to actually judge the quality of the posts.

Additionally, just reading the answers, they don't seem to be particularly good answers - certainly not worthy of huge bounties.

Considering the age of the posts (2015), quality of the answers (low), and the rapidity of voting (high)... well...

I don't think you have anything to worry about.