The nature of classified advertising tends to support increasing returns: most potential buyers will go to the largest site first because it will have the most relevant things advertised for them to buy. Sellers will want to advertise on this site because they will get the most buyers.
Many of the things that are advertised on classifiedlane.com are geographically bound. cars or collectibles are usually bought from a seller who is located relatively close by the buyer. Of course, some rare collectibles from classifiedlane.com may be bought from people around the world, and people certainly often want to look at real estate in other towns, whether for relocation or vacation purposes.