I have a suggestion for you OP, instead of making this thread and answering those questions, why not you will directly send PM those gamblers owner with your proposal. Just look at the gambling section, (not here the gambling discussion) and find a good gambling site that you think will accept your offer, but I think you will deeply face different problems regarding this.
Good luck to you and also hoping that you will found them.
I checked OP's history and OP did message two websites to negotiate the offer, the first is Stake.com, I can't be sure about the Turkish one. There seems to be no direct reply from Stake.com because there is no quote mentioning OP, I might have missed it but this might be a lost cause.
As far as my knowledge goes, stake doesn't accept investors because it totally and completely runs on its own bankroll. There are so many gambling sites which are popular that accepts crypto investments, bitvest, for just an example. Anyone can invest in it with a click. To op, if you want to invest huge funds in any casino, best is to contact them via email, trying to contact them here or through just a reply to their ANN won't do much good!
Right now opportunities for investing is available with different gambling websites, but you'll find those earnings to be very low. Better you start your own Casino business or