Earlier quoted context omitted.
Given that Vercel was founded 10 years ago, and they sell services for money, and then take that money and use that to pay people to work on various technologies; why would that make it less likely to be around in 5 years vs a person who isn't getting paid and is doing an open source project with no visual means of support? How do their bills get paid?
I'm not saying Vercel won't exist, they almost certainly will. What I mean is that the goal seems likely to be to influence how software development is done in every way possible, from deployment to client code. Vendor locking, with even more control. I'd pitch Vercel as "Heroku's growth plan but more control of everything." Maybe with a bit of EEE thrown in, but who knows.
If we want open source to be viable we have to support actually having businesses around it. Vercel making it easy to deploy to their servers seems like a fairly decent business model compared to some of the other options.