Roll-squatters, Loot Time Limits and those who never roll.

[Ashkendor]

Similarly, if you roll slowly because of some other concern, that may be more legit. (i.e. maybe your baby started crying, maybe you have a disability, maybe a fire started in your kitchen etc etc.)

Pictured above: a legitimate reason for not rolling right away.

I am not sure I understand your last sentence.

You aren't waiting 21 minutes for the roll whether there's 1 person or 7. You're waiting 3.