super tight profit question

[weewees]

I'm new to full ring and am playing 200nl at stars with you regulars a lot and notice a lot of you are playing <10vpip. Now, this to me is extremely tight even for full ring but apparently is profitable for you all. My question is 15vpip or less ideal for most profit or is being super tight just the easiest way to make money?

Also, sorry if this has been posted before. I'm new here.