What?? I've never received a text that my blood saved someone's life! They're damned prompt however about reminding me to donate when I'm a day past the minimum interim time. Leeches.
It's a positive feedback loop. Just like the "likes" on this site. But in the case of the blood bank, it's causing good to happen in exchange for little hits of dopamine. I think it's quite brilliant.
Wait, who the hell is Hospital?