CNAME cloaking is one of the more significant differences. It's typically used for tracking (and is becoming increasingly common), but also works for advertisin

CNAME cloaking is one of the more significant differences. It's typically used for tracking (and is becoming increasingly common), but also works for advertising. Instead of linking images/scripts/etc. to ads.advertisingcompany.com you can simply set up a CNAME under your TLD that points to the advertising company. Now the domain no longer appears in the blocklist, so all the requests (uploading tracking data, or downloading adverts/scripts) work just fine. With MV2, uBlock is able to inspect the DNS record while it is vetting the request, thwarting this workaround.