>>106001125Probably only as much of an issue as the phone number thing for Signal is, which is not much.
>Buy with cashHow do they then get your key or whatever you use to validate to you?
>Buy a key directlyCredit card number again.
Pretty much all of these that want to be allowed on Google Play Store have to have some kind of KYC method baked in somewhere, even if it's not immediately obvious. Sometimes it can be as much as needing JS to run some CloudFlare fingerprinting when you go on their site.