And yes you have to spend it all
Edit: There are a lot of little good things in these answers that I often ignore. Thanks everyone.
And yes you have to spend it all
Edit: There are a lot of little good things in these answers that I often ignore. Thanks everyone.
It depends on what I’m trying to maximize.
If I just want the happiness spike ASAP, then I would just buy $15 worth of Magic cards, or maybe a booster pack or three, depending on the set.
If I’m trying to maximize my overall happiness over any amount of time, I think spending $15 on something reusable, like a nice pair of socks or a hat would work out for me.
If I want to maximize happiness in general, then spending it on someone else I care about does double duty. It makes someone else happy, and I get happiness from being involved in the process.