I don't know why you judge this situation only from one experience that includes Doge coin and I think freedoge.co.in is a different project and some people don't even know this website.
I didn't. That was just one example I gave.
And personally I can say that there was high demand on it in one famous crypto casino. I think you should do more market research and then make a decision cause only judging from one experience isn't fair,
I have done plenty of market research over many years. I was invested for a long time in one casino which had many altcoins and monitored the volume and profit generated on each coin.
What could be the BIGGEST big deal of all additions that could ever be would be ethereum with staking and yearly return on top of it. Think about it this way, if ethereum is added, and given option to gamble and lottery and whatever like everything else, that would be a big job, and not starting a new website but to just add ethereum on this would be very hard for the brand as well since this is free"bitco.in" and not ethereum.
However if you can achieve that, we are talking about people making money by putting their ethereum here, ethereum will be a proof of stake soon, they will be capable of staking here even if they have less than 32 ethereums (which will be required afaik) and they could also get yearly 4% or whatever that you give for bitcoin, and that means people would keep their money with you for YEARS.