It’s been confirmed by the man himself, T1 is free!
While Riot had earlier made a post detailing Tyler1 had been unbanned, it was revealed to be a hoax as that Riot account had gotten hacked. This deeply disappointed fans, prompting them to remind / beg Riot games to unban the popular streamers.
It was likely the hacking scandal involving the Riot employee that sped up the process to unban Tyler1. While Tyler1 has been unbanned, it is very likely he remains on ‘probation’, since after all, he was a notorious streamer known for trolling and inting games for his pleasure.