if I register and play, for example, I want to deposit LTC or DOGE, can I exchange it for other cryptos on Primedice, I think it would be interesting if there was an exchange feature there, even though this idea doesn't look attractive, but it looks cool, in my opinion
No you can't as there is no such feature in PD, even in Stake. Others will surely treat pd and stake as exchange/trading sites if ever they will add that feature. Then it would be better for them to create their own exchange site instead.theoretically they would also not be convenient to use for this purpose, given the cost of commission to be applied and a limited volume of orders and at that point, introducing an internal exchange, they should practically always request the KYC or AML at least in European countries or North America.
I've seen the opposite in the past years, i.e. exchange sites that also introducing gambling sites
