I think with the modularity, people will use them for a number of reasons.

There will almost certainly be a market for gambling to run atop fedimint. But now the poker chips ARE actually as good as money, and you always know they return to you eventually, or you keep a cut.

Or gaming companies that can embed ecash as data objects in games for players to find or win and immediately reissue for real money.

All redeemable on chain or over lightning with complete privacy.