[scarface74]

Well yes he does make most of his current income from ads - mostly from his podcast. But he made most of his wealth from his equity in Tumblr as the first developer. He also sold Instsgram to another company and makes money from the OverCast app.

[DavidNielsen]

He created Instapaper, not Instagram. He sold it to Betaworks.

They've been doing great work with it lately and have a solid subscription business model now.