The only way this would make sense is if Digital Ocean offered the PaaS layer for free (or very cheap) to boost the sales of their underlying services (droplets, spaces, etc). Otherwise, what's the point? It simply won't be able to compete.
For example, static sites should be included for free on top of Spaces. There's no way this offering will be able to compete with Vercel, Netlify, or Firebase which all offer static sites for free with CDN. Vercel even includes 1TB of traffic per month, for free.