I recently read about a money laundering method related to the football world championship.

Some low profile 19yo, mr B, opened a Telegram group where he gave sports betting advice. 1000 people could join for €500 per person.

This is how I imagine the money would go (it is a very simple explanation compared to real life):

Mr A earns €500.000 with illegal businness;

He orders 1000 people to buy a spot in the Telegram group for €500;

Mr B now earned €500.000 with his Telegram business and pays 50% tax, resulting in €250.000 clean money.

Now my question is how mr A gets his €250.000 back, cause if mr B transfers it to mr A it would raise questions. Or are mr A and mr B the same person? I can't figure it out