The community seems conflicted on whether applying for work while visiting the U.S. vs actually performing work is beyond the scope of a tourist visa.
http://travel.stackexchange.com/questions/2157/can-you-searc...
http://travel.stackexchange.com/questions/2157/can-you-searc...
While on the ESTA you can conduct 'business meetings'. I've (tried) to raise VC, interview at YC and conduct job interviews on the ESTA and it's been fine. At least the border patrol people didn't seem to mind.
But you're right that the guy im the article is from Lithuania, so he might be using an ESTA.