Charging a per-workflow-minute platform fee makes a lot of sense and the price is negligible. They're ingesting logs from all the runners, making them available to us, etc. Helps incentivize faster workflows, too, so pretty customer-aligned. We use self-hosted runners (actually WarpBuild) so we don't benefit from the reduced default price of the Github-hosted runners, but that's a nice improvement as well for most customers. And Actions are still free for public repos.
Now if only they'd let us say "this action is required to pass _if it runs_, otherwise it's not required" as part of branch protection rules. Then we'd really be in heaven!