Comment by jeroenhd

From what I can tell, OVH allows for unlimited traffic, unless you host in Sydney or Singapore.

Budget hosters will either cut you off completely (shut down your VPS) or throttle your network. For instance, Contabo doesn't charge extra, but it does reduce your network speed to 100mbps if you're exceeding an average connection speed of 100mbps over a timespan of 10 days. Leaseweb offers you the choice to power down a VPS when exceeding the bandwidth cap (though this is disabled by default).

If you need more bandwidth, Hetzner is popular, and charges around €1 per TB of bandwidth if you exceed their free bandwidth (+VAT, the $104k bill would be €40 under Hetzner, as 20TB is included for free) and provides configurable automated traffic email notifications before you hit that. Personally, I would add a warning after the very first terabyte, because I don't know what personal project even uses that much bandwidth.

Their dedicated servers don't seem to have a bandwidth limit, though there seems to be a fair use policy (there's this thread: https://lowendtalk.com/discussion/180504/hetzner-traffic-use... where a user complains about Hetzner threatening to end the contract after exceeding 250TB of traffic).

Many VPS providers and shared hosters won't send you these huge bills, but you should always read up on their policies when renting servers of any kind. These hosters don't come with free tiers (which I assume is the reason people consider services like Netlify in the first place) but they will usually tell you how they deal with bandwidth issues in their FAQs.