We'll get a bite occasionally. In the past we've said no because (in no particular order):
1) too old
2) too married
3) I want to watch, yes it's a deal breaker if I can't
4) Yes I want video, yes it's a deal breaker if we can't
5) Too far away, want somebody we can build rapport with (difficult to do over text and a time zone or more away)
6) No, it's not cool if you wear a mask, yes it's a deal breaker for us
7) Too young
8) Went straight to porn chat right away, turned the wife off in the first five minutes of text...
Other than that, setting this up is phuckin easy...