The hardware wallet's lifetime doesn't matter. As long as my Ledger Nano S survives for 10 years minimum, then I'm good. I'm pretty sure in a decade from now most existing hardware wallets are going to be obsolete anyway. They weren't made to survive lifetimes in the first place.

Honestly if such website with such URL actually successfully scammed you(not referring to OP) then you deserve to be scammed. Nothing is seriously more obvious than that.

I apologize to be the bringer of bad news but if you couldn't get listed on IDEX, then chances are, your project is crap.