&gt; You cited one defunct app that never went anywhere as evidence of an advertising bubble?<p>That they were able to raise $1.5M in seed funding is evidence of a bubble.<p><a href="https:&#x2F;&#x2F;www.crunchbase.com&#x2F;organization&#x2F;yo" rel="nofollow">https:&#x2F;&#x2F;www.crunchbase.com&#x2F;organization&#x2F;yo</a>