Grrrr
Why don't people update their docs !
The binding for Blink listed in the Openhab is old and doesn't work.
Need a new version and needs to be installed manually into /app/data/addons
Link (as of now) : https://drive.google.com/file/d/19rj6ZSfHHv_Ly6_A_pb0LjzsrS-g6YSb/view?usp=sharing
And the verificationURL now shows but it is slightly different to the docs - should be
https:/openhab.domain.tld/blink/xxxxx where xxxx is just the hex string not the full blink:account:xxxxxx
Now the binding is online and I'll see if it works with detecting cameras and doing something useful.
Ugh.

I see I already upped the memory limit some time ago, just pending a new package release.

Not sure if this solves the issue, but one can restrict the visibility of dashboards/items to logged in users or admins

0f62a4f8-9578-4283-bae2-ce2450cf3ae0-image.png

The default is open to all though, which may not be the best idea.