0 comission

They had already told me that they were no longer charging commission on spot operations, but now testing some isolated margin operations I see that the commission also appears at 0, so my question is if they are also no longer charging commission on margin operations

Margin is traded on Spot. So yes, 0 fees on there too. Enjoy!

And is this final or is it for a limited time?

This commission fee related question is not API tech question. Please follow on the announcement or please feel free to contact customer support for more details.