They all have that unnatural looking direct camera stare with a vague background.

A lot of them share that exact same smile. Not sure how to describe it

Also feels like the camera is the exact same distance from every face.

I'm sure if you zoom in to the original pfp, you'll find the classic image artifacts. Probably even the website watermark.

Using an actual unlicensed shutterstock image would feel more authentic at this point.