I never thought about disabling it to be honest hahah. I really thought I would win something at some point but nothing !!

If you understood my statements, then you would be giving it a thought if not now later on.
Because the number of reward points collected can be increased in this manner and also the reward points can be converted to satoshis, you are essentially getting a few extra sats confirmed with every free roll.
Lottery is a luck based thing, you might never win it actually.