Love these forums, is there a new Cars.com or Autotrader.com on the horizon?
Answer sure, but unless they are well capitalized and spend money on branding to get their name out there, they will be as good as the next Google algorithm change.
Can we afford not to be on these sites?
Answer sure, if you have a value proposition that can aggregate traffic on a group or regional website to compete with people in your area. If you want reach past your immediate geographic area, you need 3rd parties
What about local realtors or travel sites? How well do they do if they are not on 3rd parties?
Real Estate brokers rarely have the majority of inventory in any market. But do you,
Also, Southwest Airlines would disagree with the whole 3rd party listing thing. Sometimes being the odd man out creates brand loyalty and traffic to you but you have to be a fan worthy company.
Will we have this same discussion a year from now?
Yes, but I am sure I will get 50 phone calls this week asking me for "just 15 minutes of my time" in order to fix all of my traffic problems now