I merged your recent thread with this one since it is about the same topic. Please refrain from making multiple threads about the same topic as it is considered spamming.
Why is it i'm reporting and getting emails back from UBI saying action has been taken against the player who is smurfing. But i'm not getting the Elo i lost from said smurf.
Firstly, the Thank You letter does not specifically say the ban was because they were found to be smurfing. The player behavior team is still investigating Smurfing and I am fairly certain we have not begun banning players just because they are apparently Smurfing.
Secondly, the MMR Rollback only applies to players who were banned for Cheating currently. MMR Rollback is not applied for players who were banned for toxicity. As previously mentioned, the team is still investigating Smurfs and working on a plan to properly address them. I know some people think that Toxic Behavior bans should also cause MMR to be rolled back.
Personally, the problem I see with doing this is in situations for players who were banned for chat toxicity. Assuming that player was actually playing the game and not throwing on top of being toxic in chat, they didn't really do anything to change the course of the game. You could technically argue they did change the course of the game by playing mind games with people and causing them to tilt. The good thing about the game currently is players have the tools to mute players in matches to prevent them from interacting with that person. I personally have All Chat turned off, which has improved my experience. Regardless, there are risks to implementing the rollback to apply to toxicity bans that the Player Behavior team is most likely trying to workaround.
Maybe when you ban the accounts you ban the IP which effects all there accounts or find some way to these other accounts so that they cant purchase or play there other ones.
The problem with IP banning is that it is easy to circumnavigate IP bans.