Previously ECMWF did not allow any of their data to be shared publicly except for the basic images they provide on their site. Ryan Maue had the warning disclaimer up on his site about it. That went for any Euro data vendor. He had stated he tried many times he had tried to get clearance from them for free distribution of the maps he provides...even offering more money for the clearance.
I assume he either worked out a deal with them or they gave the OK for everyone. Of course people have continued to post the Euro data here for years, but technically we were not supposed to allow it. But it at least let’s me breathe a little easier knowing we won’t be possibly held accountable for that anymore...at least if it’s maps from weathermodels.com. If it’s cleared for all vendors then everyone can feel free to go wild with the posting of maps this year.