It is a matter of supply and demand. Some guys won't see you. However, most guys look at the package. You may give awesome CBJ, whereas another lady gives so-so BBBJ. You may weave CBJ into an overall mind blowing experience. Or, BBBJ may be the highpoint of the session.

Only a provider who has done it both ways can give you a reasonably accurate estimate on that.

It’s tough to speculate on what percentage of guys simply will not see any cbj providers. Personally, I will see cbj providers only if I find them to be particularly attractive and they charge an hourly rate that is $100 an hour or more below what a comparable looking bbbj provider charges.

There have been quite a few gentlemen on this site who have stated that a BBBJ is something they would require in someone they want to see. Personally the BBBJ or even a CBJ is way down on my list as to why I would see someone.

You may have quite a few just pass you by if BBBJ is not offered, but I am sure that there are many who would look at the overall experience (by reading reviews) and make their final determination that way.

b-

Newbie here,
but here's my take on it.

forget about how much it effects your business and decide if you feel comfortable doing it.
If you don't, it will show and because of that it will not be as enjoyable for the gent.

Sometimes you'll run into guys like me, who don't even like BJs of any sort. At all. So with guys like me, it becomes a non-issue.

Why don't I like them? I simply think that they're gross. (Yes, I imagine that something might be wrong with me.)