They are worth their value in sats, but also worth the trouble it takes to decide to actually do the zapping (how much, which posts, how much will be left in your wallet, etc). The second part is what is do interesting to me.

Something about how SN works make that decision very easy, even though in most circumstances, dealing with trivial sums of money is annoying. Of course, SN is not always trivial sums, but it's not hard to believe that 10 sats will remain a mostly trivial sum for the foreseeable future.

Is it the color-changing lightning bolt (and other smooth design decisions) or is it the social interaction? Or something else?