I would try not to shut them down, but to make it clear that a meeting has a cost. If they are willing to meet that cost then fine, meet them. If you gain ben

I would try not to shut them down, but to make it clear that a meeting has a cost. If they are willing to meet that cost then fine, meet them. If you gain benefit from the meeting then, as I say, you can refund the fee. Be honest with them - meeting with them costs you money, and if the meeting is of value to them, they should be prepared to pay for it.