it is true what you are saying, but my question is really simple, it doesn't matter if I have a 50% stake or a 0.002% stake, if the sites PROFITS goes from 2k to 2.2k (example) this means my investment also grew 10%
No, it makes all the difference. If the site profit goes from 2k to 2.2k ... it means the site made 200 BTC in profit. So if you have a 50% stake, your investment would've increased by 100 BTC (50% of 200 BTC). If you had a 0.002% stake then your investment would go up by 0.004 BTC. How much in % increases that was, will depend on how big the bankroll is...
and I have a more personal question for you RHVAR, do you use the offsite system at all? because if you only use the onsite system you are exposed to a 1.5Kelly, but that dosnt mean you will eventually loose your entire bankroll, this only happens if you use the offsite system exposing yourself to more than 1.5Kelly.
Yeah, I'm currently using the offsite system. But mainly because I have invested in both bustabit and bustadice. So by using the offsite system, I can limit my total counter-party risk and I can easily rebalance by moving money between the two. I also use it extremely conservatively (right now I have 3:1 onsite:offsite ratio on bustabit). For most investors, I advise strongly advise against using it due to its potential to backfire if you don't really understand what you're getting into. While pure onsite is more "set and forget" which is probably more suitable.