Technical question from a non-technical guy... Sorry if it comes out as something stupid, but I rather seek an answer to my ideas than putting them in a dark corner.

I was thinking about how some wallet providers or even individuals do sometimes use fees that are just "too low" to get fast confirmations. This may not be an issue when we are transacting between individuals, but it can be a pain in the ass in some cases. One of such cases, and the one that has led to this query, is the casino deposit feature.

No need to explain what a deposit is, but most, if not all casinos require at least X confirmations from the network in order to credit the deposit. Nothing wrong with that, since they cover themselves from a double-spending attack. However, in some situations, transactions get stuck and the player is left to wait (bad luck fella, use a higher fee next time) for a long time. The main reason this feature exists is to prevent double spends, as I have already mentioned, but I'd like to know if there is an alternative to it.

I know transactions with RBF can be double spent (or accelerated, call it however you like it most), but is there any other way to actually do this? CPFP is a kind of RBF, IIRC; so, if transactions that don't have RBF active can not be double spent, could hypothetically a casino run a node that is able to tell if a transaction has this activated, and in the event of it being negative, instantly credit the money with no confirmations required?

Sorry if the explanation got a bit messy, I can try re-explain it again if that's the case. Thanks in advance for taking the time to read this