FaceApp has denied that its using this data for profit and data engineers suggest that this is the case. It's worth noting the app is behaving exactly the same like it does very much with Facebook, Instagram or Whatsapp.
The thought however is scary that a company now has access to over 150 million faces in an age that image manipulation with AI and DeepFakes is getting hard to distinguish.
Like other AI filter apps, FaceApp uses servers to do its processing and has to be connected online. Faceapp confirmed to TechCrunch, that it accepts requests from users to remove their data from its servers. However, given the recent news, the team is currently “overloaded,” but users can send the request through Setting>Support>Report a bug with the word “privacy” in the subject line.
It's a simple rule really, if you post something on the internet, it's public. This isn't any different than uploading a picture on Facebook or Google services. This mirrors the events of the Facebook data breach scandal with Cambridge Analytica when the company extracted user data through quizes and then used that information for profit.
It's something to want to see what you'll look like 20 years into the future and it's a philosophical question on how you view aging, either way it's best to remind users to read the terms and conditions before jumping on the trend and the conversation about how your data will be used will continue.