None? I've had this for a long time with no issues. That's weird. I'm on it now listening to spotify, reading WaPo and browsing HN. What sites complain? I'll try it?
You might have gotten lucky with the static IP / subnet assigned to your machine.
I set up a VPN on a Digital Ocean instance and got captchas all the time on various websites, especially ones using CloudFlare etc (I’m aware of Privacy Pass but didn’t bother setting it up as it was a temporary thing)
You can always use Privacy Pass as quite often you're dealing with CloudFlare protected sites.
That said, if you're using your own EC2/lightsail instance you won't see as many CAPTCHAs as, say, using a commodity VPN service.
Given you can't detect a VPN per-se (if configured properly) usually the way it works is that the destination node knows you're coming from a source IP from a known VPN-supplier's well-known IP-block.
If you go for this kind of setup (running your own VPN on AWS) you're simply changing your ISP to Amazon. They still might (and probably will) be monitoring egress traffic at the very least to perform any kind of incident analysis.
Just curious, how many captchas do you solve with this setup daily? Or even IP bans?
I did exactly the same thing once and it was so annoying.