Micropayments aren’t more of a thing already for a reason. There is friction and overhead with signing up for a 3P subscription service even if the actual dollar cost is negligible.
The reason is high credit card fees. If payment gateways allowed micropayments they'd be more popular. (Square, for example, charges 31-33c on anything under $1.)
If NearlyFreeSpeech.net needs to make $1 of profit to be sustainable, they would just charge $1.50 for their product, and I highly doubt there is anyone who can afford $1 but not $1.50