Majority of gambling sites now doesnt really accept any investments but there are some which are still accepting like
https://www.bustabit.com/bankroll/change-bankrollWhich no doubt that it do really make profits in long term but dont expect for it to be big but not really that a bad idea.
For totally new casinos that do ask out for funding to build the site then this is where doubts and hesitance do starts.
But there are casinos like Betfury, OWL, Chips, and some others, that have their own house token, holders get a piece of the profit on a daily basis, and some of them have even more features for their tokens! With this feature it's better to start earlier, you get to mine more tokens for less price! The ones who come later need to wager more to get the same amount of tokens...
It's simple, new casinos must offer some great promotions if they wish to attract people! Look at Stake with a $100k price for a daily race, Wolf with $5k... competition in crypto gambling is already crazy, so new casinos must be competitive if they wish to draw our attention! And it's on us do we want to try that new casino with some awesome promotion or will we stick with the old ones!
Although there are some casinos are quietly doing good for their launching still we cannot trust those new casino exist because even if we knew that there are still good benefits for early adopters I will keep my vigilance on new one because we will not know if they are scam or not but if we want to test the waters best for this is to deposit a small amount of money which can we literally afford to lose.