I believe it's too early to judge since its just around 5 post they have made.
Maybe with time improvement would be notice
This is a second chance, therefore they would be aware that many eyes are on them to check if the second chance was respected and put to good use.
I don't say about second chance is worthy for giving to DiMarxist. I only asked why it is different than four other users, no signature ban.
If it is a mistake, it can be fixed.
Maybe it wasn't actually a mistake by whoever that unbanned him and as well extended that mercy to his signature. A prerogative of mercy is usually given at the discretion of the giver and sometimes the reasons could be personal or based on the giver view towards the offense committed. At times when people receives a kind of pardon that is too good to be true they should also be very careful and watchful of theirself as they are certain to receiving the hit harder and worst than before if a true repentance is not found in them going forward. I hope @Di Marxist would have learnt his lesson returning back.