FAQ 288 explains in the first paragraph that basic account holders will not see ads on basic accounts while they are logged in.
To me, that's information that needs to be in 262 and is unrelated how to downgrade to a basic account. The downgrade page itself could warrant having the information in the first paragraph of 288 if it does not already.
Also, 262 fails to tell me if a Plus account will see ads on a Basic account.
At this point, a table comparing account types (logged-in vs viewing) might be a handy thing.