Cashu is not sats. It is token. Misleading users to thinking otherwise is wrong and a dangerous move. You swap Cashu with Sats to operate.

When you buy and sell 200 times using Cashu, Sats transaction is not altered 200 times, only 1 time. As this expands, Cashu transaction becomes x100 times frequent compared to Sats/Bitcoin. And therein lies the tradeoff.

If you don't like the term token, call it something else. But don't call it Sats.

from the 2nd link you sent :

"Cashu creates a mint, which issues e-cash tokens on Lightning Network which accepts Bitcoin and uses blinded signatures to mint e-cash tokens, which can be spent, received, transacted with, and eventually redeemed for Bitcoin."

Competitive positioning will always have pros and cons. From the onset - Cashu seems like an add on option for users - and your target market is for privacy-liking users