To reiterate your point. I've used free/complimentary wifi that overlays ads (specifically: megabus wifi). It is awful and even made some sites difficult to use

To reiterate your point. I've used free/complimentary wifi that overlays ads (specifically: megabus wifi). It is awful and even made some sites difficult to use. My solution at the time was to use a VPN, but it would have been nice if I didn't have to resort to that.