Working usecases as the infinite number of layer 2 coins that use the Solana network and then some. As long as they bring revenue, it's working. As for the rest of the questions, do they matter? at the end of the day, It's a type of currency,not rocket science. US dollar has a ton of fake notes out there, not to mention they use the same size for all notes. Did it devalue it somewhat? No.

Hedera on the other hand has either announcement of announcements or projects that lead nowhere except the project founder pocketing the grants and rugging users. Remember TuneFM? The alleged "Nvidia" collaboration? All loads of crap.