I think what raised these above other simple shareable examples though is the low cost of engagement. No login, No signup, No Install. Just load page, and shari

I think what raised these above other simple shareable examples though is the low cost of engagement. No login, No signup, No Install. Just load page, and sharing was via the built in clipboard. Starting was essentially 0 cost. Sharing was 0 cost. Getting your friends or family to start was incredibly easy.