Check out this recent report from dappradar https://dappradar.com/blog/defi-activity-rises-294-yoy-as-ethereums-dominance-grows-dapp-ecosystem-overview#Key-takeaways
Overall, EOS and Tron dapps are down around 80% in the last year, with gambling dapps suffering the worst.
I can see that. It's unfortunate to see the decline in TRON's adoption for gambling, as it's better than Ethereum (and possibly EOS) performance-wise. While Ethereum has first-mover advantage on the market and a decentralized Blockchain network, it's utterly slow and expensive to use for day-to-day gambling. I believe that the TRON Foundation needs to "ramp up" its marketing/promotion efforts in order to increase dApp usage on the TRON blockchain. The more developers join the TRON ecosystem, the more dApps will exist on the Blockchain itself. People will come right after they notice the true benefits of TRON compared to other leading Blockchain platforms on the market.
While the number of gambling dApps on the TRON blockchain are limited, they're still loads of fun. I hope that gambling dApps on the TRON blockchain would remain actively used by gamblers and everyday people. But if usage/adoption continues to decline, I'd have to look for other alternatives. So far, the most popular gambling dApps on the TRON blockchain are 888Tron and WINk. With 888Tron's attractive dividends system, gamblers could remain on the TRON blockchain for the foreseeable future.
Sometimes, I'd wish there was some sort of lottery (lotto) and a wide array of games to choose from just like it's the case with Ethereum nowadays. But at least, it's better something than nothing. Just my opinion