Appodeal has a new dedicated GDPR page: https://www.appodeal.com/home/gdpr/
I highly recommend that people read it. One of the main take-aways I got from this was this in their FAQ section:
Do I have to request a consent only from EU users?
As the global privacy laws change, we recommend to request a consent from all users once, no matter where they are currently located. That will eliminate mistakes of not collecting consent from EU residents who are on a vacation elsewhere, for example.
I know this will annoy a lot of end users, but they feel (and I kind of agree) that you can’t trust any method of determining where someone one is because of things like vacations, VPNs etc. Given the various Facebook vs. privacy issues here in the United States, your customers may actually enjoy having that control too.
Rob