I have 6 domains being parked at GoldKey for months, and been receiving payment as long I reach the pay out limit. These rarely have natural/type-in traffic. I put links from my scrap sites, without hiding them. These are direct linking to the parked domains.

It was a test, but I am surprise that visitors actually click on my scrap sites and go to the parked domains. Just that the CTR% is not great. Earn just few dollars per month.