The only thing you are missing is that this isn't about the users, it is about Venmo. They can a higher percentage from the transaction than they would as inter

The only thing you are missing is that this isn't about the users, it is about Venmo. They can a higher percentage from the transaction than they would as interest in their main account. This is the same reason that all banks rushed to do debit cards you could use as Visa etc. They are getting the fees instead of AmEx or Discover.