Google will assign a real person to talk to if you have more than ~30M views / month or something.
Paypal requires lots of paperwork here in the EU, sometimes their staff will make mistakes or ask you to provide information twice.
Facebook is horrible. In one case, when asked about something simple as their billing address, they gave the wrong answer (causing reporting problems). Their developer support is generally a real pain.
...or if you pay for their paid services (Google Apps).
I know, I know, horror stories and everything. And the service or the customer service is not always free but at least you can speak to someone, you can have the process explained, you can appeal etc.
> which free service (or service that pays you money, ala AdSense) has a better approach to customer service?
The parent answered with PayPal, which is not free.