They do what they say...they introduce you (for money) to the pro of your choice. He then gives you a short video critique.
But I have grave doubts about the ethics and the worthiness of the service provided. It looks to me like a paid critique service and probably a poor one at that.
I have also like you grave doubts about the buying credits issue and then only a refund of credits if you do not get the pro you specifically want.....any reputable company will give a customer their money back if they have not fulfilled their part of the bargain or if the customer is unhappy with the service provided. This credit refund system rather than a pre set returnable fee is a classic way of getting your money and holding onto it. Very unethical.
Can I ask....were you told which pro was looking for talent and if so did what specicifc details and criteria were given about the kind of submissions that specific pro was looking for. I watched a vid where the Blazetrak guy went to great lengths to say that the pros signed by them were actively looking for people for contracts or had projects with top singers open that they wanted material for. They were helping to match people up to this need. This sounded BS to me JUST an extra carrot used to hook people in.
I have not heard or seen anything positive from anyone who has actually used them. The only thing I have seen is promo vids etc where people say it looks or sounds like a good idea or explain the theory of how the scam er sorry scheme works. I would be interested to see some proper testimoinial that have been independantly validated. I would also like to see one of the vid replies....I mean a proper one sent to a bona fide customer rather than a tailored or doctored one used for promo purposes.

http://www.soundclick.com/bands/songInfo.cfm?bandID=687727&songID=5238055