OK, so you don't know how curation works. I am on my phone now, but I will be home in a couple hours and can answer, if no one else does.

All voters will earn, the UI generally only displays the highest voters. All can be seen on Steemworld.org though.

The voting is a reverse auction. Voters voting at 0t are giving up 100% of their curation. 1 minute are giving up 80%, 2.5 minutes 50%, 4 minutes 20%.. But, those in earlier will benefit from those who vote later, so there is gamofication in the timing.