When X number of jails are thrown, the game puts a Loaded BG into jail, basically a special 0 guard account that when you bust it out, it becomes a bodyguard for you.

Previously, if you were already at the BG cap, you could not benefit from this, but now if you are capped and hit a Loaded BG it will give you an Instant Named BG to use on one of your existing BGs (or to regift)

As a side note: We have increased the occurrences of a loaded BG by 20%

Yes, but it looks like like every other claim, no one can tell if they are capped or not.  It is presented as if they got a loaded BG regardless of if its a loaded bg or capped and got a perk.