> 1) Given any ad-source X from the list of supported ad-sources of Admob
> medaition, is it ok to use one of the functions I've mentioned above
> for GDPR ? Should I just change the "755" for them based on the
> website? What should I do for companies that aren't on the list on the
> website?
Replace the vendor ID (e.g., 755 for Google) with the specific ID of the ad network in question.
To access the complete and most up-to-date list of vendor IDs, you can visit the official IAB Europe TCF Vendor List page: see here. See also here: https://www.uniconsent.com/iab-tcf-vendor-list
> 2) What should I do about the US rules? Is it ok to just compare to > one of the strings, as I did? Or should I make it work differently, > such as checking a single letter or perform a special bitwise > operation?
I think it's ok.
> If I choose to be strict there (meaning assume all users chose not to
> share data), would it affect all countries in the world, or only those
> that are affected by the US regulations?
Applying COPPA settings might affect all users globally. To prevent unintended consequences, might be good to verify the user's location or the presence of "IABGPP_GppSID" before enforcing COPPA restrictions.