Unfortunately, all of the crypto casinos and neither all of us here on bitcointalk will be able to fix/reduce an issue with the bitcoin transaction fees.
Users can proactively contribute to reduce their transaction fee by using Segwit addresses, and take chances when mempools get clear to move their bitcoin or to consolidate their small inputs.
Why people should be using SegWit addressesConsolidate your inputs [Guide]It would have been better to suggest that the system support other currencies or at least support the Lightning Network to speed up transactions. It is better than targeting the entire site as if it is responsible for the network congestion that occurs.
Lightning Network is one of methods to go. It is an off-chain solution but one disadvantage is not all users already use Lightning Network and not all users will be ready to go with Lightning Network.