"Make it, take it" rule in effect tomorrow at Probowl as a test. (Onside kick alternative)

Cousins kind of went rogue on the attempt. I'm most teams wouldn't throw up a hail mary. But what do y'all think of the details they just mentioned on TV? In that it's suppose to be only allowed to be done once per team and if that team is two scores down to help keep the games closer.

So that eliminates a team always going for the 4th and 15. But does that mean you can't do a regular onside kick after this one attempt?
I'm wondering if they do institute this rule, if that means they are completely eliminating the Onside Kick as an option. Or if you can choose between one the two as an alternative?

It does make sense to limit 1 attempt per game, only if you are down to prevent abuse and really save it for desperate moments.