I have several Google accounts, and one of them received a notification that the waitlist for Bard is now open.
Since I try to consolidate my AI efforts under the Bredemarket account, I used that account to access the Bard waitlist.
That didn’t work.

This Google Account isn’t supported
Bard does not currently support Google Workspace accounts or when our systems indicate you may be under 18.
In essence, Google wants personal accounts, not accounts from people who use Google to manage their businesses.
There are other restrictions:
For now, Bard is available only in US English in the US and UK.
So I used one of my other Google accounts to join the waitlist.
For Bredemarket purposes, I will continue to explore other AI assistants.