Just to add a data point: I had a Florida absentee ballot, and if I had mailed it from within the US postage would have been free (or covered by Florida, presumably). So no stamp issues.
Since I’m out of the country at the moment I had to pay postage but that’s entirely reasonable.
That’s why it’s not a poll tax. The state itself isn’t levying a tax at all- you can deliver the ballot yourself, or you can have someone else- USPS, FedEx, UPS, a commercial courier service, a friend’s teenage child, your spouse, etc… to deliver it for you. Not all of those cost money.
There’s not a requirement that you use a delivery service in the first place, and no requirement that if you do, that you use the USPS.
And that’s leaving out the fact that the USPS is a federal agency, and the voting is regulated by the states.
FWIW, the college students of today are not Millennials, they’re Generation Z. The title of the article shows it’s about College Students, and the first line of the article notes that it’s about Generation Z.
Millennials are in their late 20s and early 30s, and in the workforce (or at least trying to be). They’re not college students.
Bumping this because we now know that Nate Silver and Nate Cohn were right: Early vote information has no predictive value for determining election outcomes.