The Two-Million Answer ...
Stats are worth what Believers think they are worth.
Statistics can be read (and usually do so) how people want: Bearish or Bullish.
Stats are always about past events, and extrapolation is usually wishful thinking.
A number of people put forth all sorts of arguments aiming towards self-fulfilling prophecy.
Unaware persons can easily step in purposely set traps or traps resulting from ignorance.
For advertisers it only matters is how many people do will buy anything from their business.
For the parked page hosting company, priority is what the advertiser pays out - And that usually depends mainly upon how many people click on the ad from that advertiser on the parked page.
So, step one is to direct people to the parked page.
But that is usually not allowed by the parking company: They usually tell You to not send people to that parked page!
People who know the url they want, don't need to search for it.
People who search for a product or a service, will type in words in their search engine until they find some url that catches their attention.
That does not mean they will visit that url., nor that they will click on anything there.
And, if they click on anything there, it does not mean they will pay for anything.
And if something is purchased, it is usually possible to cancel the purchase or there may be a charge-back.
Millions of hits, visits and clicks are only bandwidth waste if there is no profit.
Personally, I think parked pages are worth anything that is more than the registration fee.
If Your domain costs $8.95/year, then any return over $8.95/year is pure profit.
I found over the years never a parked page anywhere in the top 25 results of any search engine.
I never look further.
Must have used wrong keywords all the time.
On the other hand, setting up webs with just a few words got many of them with those words in the Top 5 SERP.
SERP is not easy, considering the existence of synonyms.
It could help to pay for sponsored advertising, but isn't it somewhat odd to pay for advertising a parked page with so many ads of competitors?