I had a long conversation on this some time back with someone else, can't remember who. The other person was of the opinion that banner ads should be allowed while I said that such kind of advertisement should not be allowed. I stick to that and do believe that advertisement is the reason behind Google and Facebook selling our data away. Anyone who want their services to be advertised should open an account here and build a community around the services they offer. No direct money based advertising should be allowed.