Sometimes you can follow ex-professional eSports player on their stream/any other media since they often bet on eSports and usually are right more often than regular users.
This is a good idea of the question only if you know such if so give me instagram profiles of them . It's hard for me to imagine - unless you mean coaches? But they don't share arcane knowledge, but rather they only make a buzz around their own team. After all, they do not care that the rival knows exactly their tactics, compositions, etc. I think it's hard to find someone who ended his career as a player and then regularly lived the stage by keeping a profile on Twitter. I think such a person has much more interesting things to do.