Remove the endorsement of exchanging personal data for content. (#451)

This reverts #436 and commit 254a8d0.
Some folks on the TAG objected to the change.

index.html

@@ -2098,11 +2098,6 @@
 unrelated feature, by decreasing the quality of the service, or by trying to cajole, badger, or
 trick the [=person=] into opting back into the [=processing=].
 
-Note that because data is valuable, some sites offer an informed, free, and fair exchange of
-appropriate user information for original content that the site created or paid for the creation of.
-If a user chooses not to participate in such an exchange, denying them access to the site is not
-retaliation.
-
 ## Support Choosing Which Information to Present {#support-choosing-info}
 
 <div class="practice" data-audiences="user-agents">