And Hetzner is a no-nonsense real company that's been around since 1997.
Hetzner machines have dedicated 1Gbps connections. Arc.io promises nothing.
Arc.io is a faceless company with no track record, no history, and doesn't say how long they've been around.
Who would you choose?
The crypto/distributed space has an issue with vaporware and not living up to claims. Arc.io has a lot to prove, in other words.
I'm hoping users will think twice before using infrastructure that's not ready, or up to par, or not likely to have longevity.
If you're going to sell high-performance then you should at least make your own website perform well.
If your website performs well then I'm more likely to believe your story.
(*I'm not assuming Arc.io does this, just that "fast" and "reliable" are table-stakes properties of CDNs.)