I learned my lesson: gave a couple of ECCIE providers money up front (for rent, food, sick relative's medical bills, etc) and promised a session later and never got one.
Many times I've seen them online posting an ad and I send them a PM and no, I'm busy hon, I can't see you today and yet you see them answering ISO all day and night long.
They don't want to see me because they don't make a penny off seeing me for one hour but technically they have already made the $ for that hourly session.