Instagram founders say selling to Facebook didn’t reduce competition among social networks

Talk of regulating Silicon Valley has dominated this year’s SXSW festival in Austin, with Sen. Elizabeth Warren’s (D-MA) pledge to break up Amazon, Apple, Google, and Facebook becoming a topic of conversation in almost every high-profile, tech-focused panel here.A sit-down with Instagram co-founders Kevin Systrom and Mike Krieger this afternoon was no exception. The entrepreneurs sold their company to Facebook, worked there for years, then abruptly left last September amid reported