I was testing and I really did tons of tests because I am researching the history of the Balkan and Europe I write all the time on many groups on my website and the Facebook and other platforms.
I noticed that when I share the link on my website that is using BB plugins that I see no excerpt (a short preview of the content) instead I see only link despite the fact that the group is public not the private.
Unfortunately same goes if I share it on my profile or anyone else profile.
It should actually show excerpt a short summary of the content and with the button Show more... so that the users can see the image that was used on the post and the text preview but as said that feature is not available and I was hoping that You will implement it sooner than later since You guys are long time on the stage and should have certain advantage over the others competitors!
Just my thoughts.
Hope you will implement this because it would be greatly beneficial to all of us. All we can see is logo and link that we share nothing more. So each time you want to see what the contact has sent to you, you will need to open the link. Kinda boring.
All best
Samir.