Keen Home was purchased by Ecovent, a manufacturer of wildly costly custom Internet-controlled vent systems.
I have experienced four outages of the the Keen servers and vents this season, killing the automation of the vents each time, and each outage lasting for days. That's why I'm ditching their hub in favor of HE with Rule Machine.
Will Ecovent continue to sell and/or support the Keen vents? Who knows, but it seems to me that it's an excellent time to convert off their horrid Internet server architecture and apps to fully local control.
I've got an Ecobee too, but after their recent server outages (https://status.ecobee.com/) I'm not going to bother connecting it to Hubitat at all - not using their API is one less failure point. At least Ecobee continues to function locally without their servers.