BBJ/Beast is absolutely a form of rake.
First of all, very few people will ever hit a BBJ. (More people might see a benefit from the Beast, but that money has to come out of the pockets of players who don't rake as much).
Secondly, according to your own website there is a 10% fee for all jackpot contributions (
http://www.blackchippoker.eu/thebeast/)
How can you possibly have the stance that BBJ/Beast deductions aren't a form of rake?