A small cap alternative to RLB is WINR. Watching as it could have much further upside potential with a smaller market cap of 12 million than Rollbit's (RLB) 561 million.
My understanding is that WINR aims to be a gambling/igaming protocol that builders can use to easily make their games, so rather than being a casino (RLB) them self WINR just provide the protocol layer for others to build iGames, casinos dApps upon.
WINR claim: WINR Chain will be the one Layer 3 solution for all iGaming dApps within the blockchain space.
Chart shows WINR (orange line) is very closely correlated to RLB(candles). Also WINR TVL(lower line) has been growing recently.