They don't for traffic. So you do run a small risk of something happening.
However, Linode at least pools your VPSs so if you have 100 of them and 20 of them "go over" the cap you still are often okay because of the other 80 that didn't "go over".
The truth is none of these providers provide truly hard caps. The difference is with Amazon/Google/Azure/etc you can realistically get hit with a 4 figure bill if something goes seriously wrong.
DO/Linode/Vultr I've never seen accidental "mistakes" causing that sort of thing and even an active dos/ddos attack that would cost you more than $100 in overages before they started null routing you.
Is there?
And this is exactly why we're running out of publically available IPv4 addresses.
Will stick with Linode.
The only bad experience I had was with SES - we got blocked by high bounce rate, sending to a test email that did not exist (specifically because it was a test email). It took two days for the special unblock team to unblock us, even though the general support guy I was talking to had responded a couple of times in that wait period.
The right thing to do is to just discount the product and just re-use IPs unless otherwise reserved. Mail in rebates can be ignored or "lost in the mail" and seems to happen often enough for me to have lost trust in them. I have little control over what the vendor does, so I would rather avoid vendors who think screwing with me is ok.
I don't buy products with mail in rebates and now I won't buy into lightsail (Presume this thread is accurate and Amazon doesn't fix it).
That's $3.60/month... seems similar to mail-in rebates—many people forget, and accidentally give Amazon some (mostly) free money.
Also, from later in this thread:
> FWIW, bandwidth overages at Linode and DO are $0.02 per GB, LightSail is $0.09.
It's these seemingly-tiny (but not-so-tiny when I'm running 60-70 VPSes) costs that kill when you get your first bill after a large traffic event.