I'm just want to know (estimate) how often they really use it so that I can kind of calculate how much work I will be doing answering questions etc.
In my own experience as a client, I would use this kind of service a lot in the beginning because I have many unsolved questions (that's why I would hire someone). But as they are solved I stop asking questions that much, and even though I'm paying monthly fees, I would sometimes not use the service at all. However I would think "I might need it next month" and keep the service a few more months.
I was thinking of offering "unlimited email consultation" but I am kind of worried to get bombarded with many many emails. But considering my own experience, it may not be that I get emails everyday from every one of my clients.
It seems a lot of guys here offer coaching, consultation etc., and some offer "unlimited" email support so I wondered if you can share how often you get consultation emails. Of course it probably depends on the niche too, but just to get a general idea...