Correction: Andrew Mason actually is a programmer. He built Groupon in Rails. Also, as the other commenter pointed out, Mark Pincus's co-founder Justin Waldron

Correction: Andrew Mason actually is a programmer. He built Groupon in Rails. Also, as the other commenter pointed out, Mark Pincus's co-founder Justin Waldron is a programmer, but Zynga's probably a bad example anyway because Pincus was very much an accomplished entrepreneur with a lot of resources at hand prior to founding Zynga.