arc[dot]io reviews? (Rent your users' bandwidth)

EDIT: I ended up writing one myself: https://www.felixparadis.com/posts/arc-dot-io-review/

arc.io reached out to me after I added Simple Timeline as a product here on Indie Hackers.

In a nutshell:

Arc is a peer-to-peer Content Delivery Network (CDN). Add Arc's widget to your website, your users contribute bandwidth, we rent it, and you get paid the proceeds.

A monetization method that doesn't involve selling or ads sounds enticing, but I can't find many reviews of arc.io and feel reluctant injecting someone else's JS code on my website.

@martinratinaud 's post is the only "arc.io" mention I found on Indie Hackers.

The hackernews discussion about arc.io boils down to almost everyone saying they wouldn't use it, but some admitting it's a cool technology.

Thoughts?
Experiences?