Comment by pnt12

And even if it's "small stuff", I do believe acts of kindness are contagious, and lead to other people doing good deeds.

If we want to rationalize this EA style, we could say these small acts to have an exponential effect: 1 person can inspire 2 to be more selfless. So it's better to start propagating this as soon as possible, to reach maximum selflessness ASAP :)