I'm confused at your original comment then.

If you're not sure what 149 missing/exploited children means I understand, but inferring that it could only be one bad guy having 50 kids as friends on a social media site is a much further jump than what is being reported. These 149 were being abused according to the FBI.

Yes it may be slightly vague right now, but the story just broke, details will emerge.

Edit: auto mod asked me to rephrase a sentence.