" Hey Twitter/LoL players, If you are a current Masters+ (masters, GM, or chal) player OR you finished last season in Masters+, we want to chat with you about gameplay, matchmaking, and player behavior at high elo. "
Here is the direct link
https://twitter.com/RiotBlaustoise/status/1149362453408448512
Edit: The tweet got deleted but I took a screenshot ;)