yes , a dire situation but will i think it will have a positive outcome as they are forced into crypto they will be years ahead of the rest of the world and will be economic leaders once the world catches up.

yes i have seen a few dexs and trading platforms with zero fees i haven't looked at digiex but generally the terms of zero fees are for selling trading data to HFT firms so they can front run trades also none are truly decentralized more like quasi-decentralized and having no fees facilitates market manipulation at zero cost
but no matter soon will be possible on Bitcoin so i dont see the point to use for the short term if they will be obsolete could risk your coinage by using if a third party can access wallets or skim keys