content: Yup. If you like and use a service online you have to expect them to at least pay for their overhead (I know FB is way beyond that). Hosting a busy Internet site is not cheap or free. It's not run on a DSL connection on some old pentium 2 that someone had laying around. Equipment, staff, buildings, software, internet connections and/or cloud services like AWS will cost you more than a small city makes, pretty quick. For the record, I'm not seeing ads on FB with uBlock.