All of them manually opted in. One vendor was using Zeus before square made it easier. Another I convinced to turn on the week prior, knew very little of bitcoin before that, until I explained to him why I live on Bitcoin. It’s my understanding that the default option is only available to vendors who have that tablet with a customer facing screen that shows a Cash App QR code. But the QR code is a secret lightning invoice too. But they would have had to update their firmware.