Seems like kind of a non-story to me - Russians develop apps, FBI considers any Russian app a security risk. Ok.
It's a counterintelligence tool since it effectively funnels biometric info to the Russian government. All of those users can now be identified if they are ever engaged in any meaningful capacity of intelligence gathering.
China, and the U.S. even, are pushing to build the same types of databases. The shit has hit the fan, because ingrate couldn't leave well enough alone and uncorked the Holy grail of pervasive automayed mass surveillance/identification.
Combine the pictures with information from a certain OPM leak, and now foreign agents can now identify American assets on their home turf or while operating in America.
The first time I read about that app, I NOPED out loud and made sure no one in my immediate circles had anything to do with it. Data is precious, and there are more ways than ever for people to Hoover it up.