Starting 5 days ago, Vercel is creating a Preview Deployment for every push from my connected git repository, including the push from members outside my Vercel Team.
Last week, only I (the vercel team member) could create Preview Deployments.
Collaboration is free for public repositories, but has never been allowed for private repos on the Hobby plan. A few months ago, our team shipped a fix that ensures our collaboration limits are enforced in GitHub.
Only members of your Vercel team can deploy from a private repo. If your team is on a Pro plan, you can add your collaborators as team members so their commits will be automatically deployed.
I misunderstood your original issue. Most of the time people ask about the opposite scenario, actually wanting commits from people outside of their team to trigger deployments. Thank you for your patience.