I don't know how many people use sMiles. It's mostly a step counter app that pays out tiny amounts of sats for steps, but also has a couple different small fountains and chess matches for sats.

A few days ago, I noticed that they added a new earning option. Similar to Zebedee, you can earn sats for playing certain mobile games. There seem to be fewer ads than on Zebedee and the rewards seem to be higher.

If you want to check out sMiles, here's my referral code: Undisciplined582