Is it possible

To poach a player from another team mid tournament if the player has been eliminated from the tournament,
Example : Can GE hire Primmie as a sub now that he's out of Masters

No

i think if only the other team agree so if FS would let primmie join them just for this Master like TenZ with SEN and C9

im not sure but i think there are complete rulebooks u can find on the internet maybe they contain something about transfers, but i doubt it would be possible

even if it was possible changing something mid masters is like the dumbest idea ever