I was very sad to hear that Radisson Rewards was shutting down their credit cards. My Radisson Rewards business card was forcibly converted to an inferior card. It's still a keeper card for me, with no annual fee and a $100 annual credit I use on an expense that's $120 that I would have been paying anyways (a basic Matterport subscription in my case).
In case you have any expiring Radisson Rewards E-Certificates like I do, here's the top places I recommend using them, last I checked (optimized below for desktop/laptop view):
According to reports by Nick Reyes with Frequent Miler, these also might be used at Radisson Individuals properties, so I've included that in the map. Keep in mind that I haven't recently checked all these properties in maybe a year and that there might be other top-tier category Radissons that were added in the past year or 2 that aren't on this map since Radisson appears to have recently discontinued the ability to narrow by points in the Radisson Americas side of things that used to be present.