As to extremely burdensom... require a minimal one time fee to create the account to pay for a person to confirm their identity. Require an ID upload and a separate picture that matches a CC/Debit card to cover the cost.
If you don't have ID, a matching CC or debit card and $5, then maybe you should have other priorities other than getting onto DATING-APP
If you don't have ID, a matching CC or debit card and $5, then maybe you should have other priorities other than getting onto DATING-APP