Intuitively I'd say no, there's no way it's a significant amount of fraud. Number one because, as you said, it's rare, but number two because you just don't need a rooted phone to scam someone. You can very easily scam people on perfectly legitimate phones and with perfectly legitimate apps.

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pix128 a day ago | parent [-]

Keyloggers would be considered a form of fraud, right? Customers can be protected by not allowing rooted phones which may contain malware and steal credentials, but then again Windows is a nightmare for security and nobody is banning banking from Windows.

	▲	array_key_first a day ago \| parent [-]
		Right, but you don't need a rooted phone to keylog someone. You can just ask their password over the phone, and people do, and it works. Or, you can install a plethora of perfectly legitimate remote access apps available on the play store.