The dating show Heart Pairing added interesting option.
First show started in Italy where contestants stayed for 5 days.
Then they came back to Seoul and went for a date or two.
Suddenly they were informed that they can be in contractual relationship with other person if they 'match'.
Each person needed to pick 2 names, and sent message.
If they matched with someone ((you can only match with 1 person) then they've received their own 'messenger' app so they can communicate all the time for 3 days, and also they can go to unlimited number of dates, even spent night in different city etc.
So let's back to real life, would you do something like that? It kind of sounds like a 'trial' or a 'test run' of being a couple. I found this interesting.