It probably works something like this. Developer (who is an indirect associate of the club) says to player, "I've got this fantastic deal, join us and you've just got to be part of it.", sells player share in development. Sweetens the deal by his company lending player the stake for the investment. Sweetens it further by providing player with (most likely unwritten) guarantee to sell his share to a 3rd party or buy it back himself, for at least the amount of the player's investment, or even a guaranteed repurchase price including profit. Developer sells property or at least player's share, extinguishes company's loan that covers player's investment, with profit over and above that paid to player.
Simple, no risk proposition for the player. No cash needs to be outlaid, no risk carried by them on the investment. It is all just book entries in the developer's company books except the profit paid to the player in the end.