This is survivorship bias.<p>What you don&#x27;t see are the spots that have disappeared because there wasn&#x27;t enough demand to be profitable.  The examples you&#x27;ve given are being used effectively because the price points have dropped to match demand for those specific service spots.<p>Advertising follows user attention, and as attention shifts mediums so does the advertising.  That doesn&#x27;t mean there is an oversupply in the advertising industry, it just means that it has liquidity (more so than physical goods like lumber).