It´s a SCAM!!!
I scanned a QR code to register for a legit activity and I I got to Esrhub website and I was asked to approve a bank transaction for 0$. Then, I saw a notice that I just subscribed for their platform for one day for free, and that they would deduct a monthly fee from my bank account the next day!! Check for "ESRHub cancel" in Google to unsubscribe before they charge your account, and report them. Be aware!
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