If you are planning to open yet another MillionDollarHomepage clone, then I suggest you to consider having a stable server before launching it. Because HelpFirefox website has been knocked down due to overwhelming response in just a couple of day.
The website has been closed with a notice “The first 24 hours of this site has been a true success, with more than 13 800 pixels being sold.”.
Beside having a stable server, I think it would be wise if “Million Dollar Homepage” operators could register their domain(s) for a minimum of 3-4 years, because that would bring confidence to the prospective advertisers.
Nobody would want to advertise on unreliable websites, for a short (unspecific) duration of time.