A lot of, a t3.micro is free, I guess Amazon know who you are and which IP you were using at a certain time though.
Also, public cloud machines come with IPs of well known ranges. It may be easy to spot them if required.
On the other side, this is the approach that I'm currently using, without any problem for my particular case.
AWS offers all the regions I’d care about, but I do concede many-exit scenarios are not what I was referring to. I’ve been more than satisfied with my personal use, but have never required that feature.