Tumblr Starts Showing Native Ads on it’s iOS & Android Apps

According to AdAge’s Cotton Delo, advertisers picked to kick-off Tumblr’s new foray into a growing mobile ad market include GE, Warner Bros. and ABC. Perhaps an anecdotal indication that Karp’s stomach doesn’t turn at the thought of using advertising to monetize anymore, is the lack of any Pepto ads to kick things off.

Foursquare Raises $41 mil. via Debt Prior to Big Summer Ad Push

This financing structure, which doesn’t require Foursquare to increase the equity portion of it’s balance sheet prompting more valuation questions, gives the company more time to fully realize the potential of it’s widely popular location-based recommendation and check-in app.