Those teams are old at platinum/top100 so they have earned a lot of tokens (plus a good stock of greens).
They earn almost every season about 65 tokens from the contract and the daily box plus a good amount from seasonal events.
They are permanent tankers so they do not spend any tokens, they do not need any tokens till replace a player at retirement age (who played 15 seasons for the team).
They are proud to play at platinum or to be at top 100.
Some of them doing that for national reasons (look how great managers we are the Turks or the Russians), some of them waiting a chance to sell their team/group for real money.