Alot actually, one example would be if the owner has a certain site to advertise or a service to give. One way of doing it is to create a new one to separate your posts that was intended only for your services or ads
Meh,
I have gone through this "user" post activity, and he is just the bounty hunter. Necroposting, spamming, plagiarism, all there. I don't think any real reason for having multiple accounts besides airdrops + bounty should be applied to him. Thus I would say this is definitely painful to lose 2 member accounts in the row, ba, to be honest, you should never claim that far if a merit system would be working from the beginning.