Activate buttonThe card banner is not shown because non-admin roles cannot activate this setting.
Activate seems to work, and the card banner disappears. Different from what's mentioned here https://github.com/Automattic/jetpack/issues/11288site accelerator setting, because this feature can be activated only by admin role users.

This seems like a big issue as it impacts all JITMs, not just this one. @withinboredom Could you take a look since you are more familiar with JITMs? How do we handle requests when the external user ID (let's say 2 on a site with one admin and one editor only) does not match a WordPress.com User for that blog because the editor has not connected their account to their WordPress.com account?
This will be addressed in D24434-code.
More recent internal reference: D24890-code, and then D32286-code
This is being fixed in D32286-code.
Why did this bug just sit for 7 months after it was supposed to "be addressed"?
@sparky672 We weren't able to find the best way to fix this until now, but we're on track with a good solution now. We'll close this issue once this is done.
In the meantime you can rest assured: while the notice is displayed to non-admins, they cannot actually enable features unless they have the admin role.
This should now be fixed.