Extensions for sipbroker numbers
 

I would be willing to pay a few $ per year for a 3 or 4-digit extension to any sipbroker number.

So if I gave out a sipbroker number as my number, I would add that I could be reached at extension 1234.

And when someone dialled the number and entered the extension at the prompt, it would connect to my sip url.

Giving 1234 as an extension makes sense to people, whereas giving *01112345# doesn't.

I expect you could make some money by offering the extensions - charge more for 3-digit extensions, a bit less for the 4-digit ones.