"There is a lot more work to be done to find all the apps that may have misused people's Facebook data -- and it will take time," the company said. CEO Mark Zuckerberg announced the investigation on March 21st.

Facebook's next steps are critical here. With how much controversy one app harvesting data caused, if Zuckerberg and co. handle 200 apps the same way, it can expect plenty of backlash and maybe another trip to Washington.