[DannyBee]

"It's possible that Yahoo and Google are providing server metrics via javascript tagging to comScore."

Your suggestion is essentially that Yahoo and Google are providing non-public data from which revenue growth/etc can almost be calculated, to outside companies?

[nfa_backward]

The incentive is ad dollars. Ad companies want third party verification.

[nostrademons]

Google runs all their own advertising. They have no need for third party verification.

[nfa_backward]

That explains why debaserab2 was able to find b.scorecardresearch for Yahoo, but not Google.