I think we already discussed that some time ago. Anyways, the biggest reason why you should not pay angels to let you pitch is that you want them to be thinking that if they do not make an investment, they are wasting their time.

You can never force an angel to like you, but if you have an angel that does not get any money from your pitch, it means that the only way he/she will make anything is if he/she invests. So they will be itching to invest with someone. Again, this will not make them invest unless they like you, but at least you know they are looking to give their money to someone.

If you start paying to pitch you may easily get into a situation where the "angels" are not really looking to invest at all.