Seems like a hard sell. Technical people probably are good to use github/cloudflare/whatever pages, while nontechnical people are fine with real estate on social media platforms. It would be difficult for you to match the SLA of either without considerable resources, or for the people in-between that Just want a battle-tested CMS/brand to deliver business to customers with minimal interesting stuff or fuss.
Maybe consider promoting this free tier in/to university students? Worked for UNIX. I could see a lot of college kids wanting something more advanced than a twitter feed to create a web portfolio, willing to use something new, but without the investment of learning Jekyll for someone that's, say, a MechE or ChemE student.