I suspect that the NoCoin feature does Not work as intended.
After been in contact with the Opera Team and didn't got the help/answers needed I'll try a last time here as I also want to see if others notice the exact same as me.
Enable the NoCoin feature in settings if havent already and start Operas built-in task manager : Shift+Esc. Monitor the CPU and go to the VPN service provider Windscribes cryptocurrency mining page. It's used to revenue for users extra storage but the link I'll supply is not connected to any users.
Warning! This link will more then likely make your CPU spike so remember to Close the page after tested.
https://windscribe.com add in the end the text: /miner
If your CPU now goes above 50%, please supply a screenshot where this site and your task manger is viewble. Thanks!