As for the addresses, this needs to be looked on by somebody with much more experience than me with blockchain analysis but last year when I've been browsing through their addresses I've seen a lot of really weird things, too many of those go through tumblers, and I don't see users who can barely write down a phrase longer than 6 words being able to mix their coins this way.
That is something new for me as didn't know about it because have never checked it on the blockchain but going through tumbler services is another one of their weird things.I also think that most of the accounts are owned by the team only as why would they be paying to people high rates without getting much users from this forum and having negative feedback.
As I was compiling
the list of all 1xbit campaign participants, I noticed that many of the accounts were already identified and tagged as alt accounts and bounty cheaters. 1xbit_official is aware of this since I warned them about it on multiple occasions. However, they ignored my warnings and accepted these members into their campaigns anyway. It doesn't make sense for a company to pay members who are clearly cheating on them in their signature campaigns, so it is logical to assume that they are actually related in some way to those accounts.