I don't have Cash App, Venmo, Zello or any of those other micro payment apps because every single time that I sign up for one, I get automatically blocked on my 1st transaction. Zello is even offered directly by my bank so it's automatically linked to my banking info. Calling customer service leads nowhere. It all works out for me in the end because if I can't Apple Pay or Paypal someone I probably don't need their product or service anyway.
OTOH Paypal is an absolute crapshoot. Something like fifteen years ago they just decided I shouldn't be able to use Paypal anymore. No indication of why. It took them six months to cut me a hard check for the $100 I had in my account at the time. Complete BS system.