True, but it's also very easy as a buyer (or seller) to use more than one site. Nothing about Craigslist is exclusive and in that sense the lock-in is very weak.
A Craigslist competitor doesn't need a huge market share to be viable. For me as a seller, it just has to expand my audience of buyers enough to justify the small amount of time it takes to post and manage a second listing.
A Craigslist competitor doesn't need a huge market share to be viable. For me as a seller, it just has to expand my audience of buyers enough to justify the small amount of time it takes to post and manage a second listing.