A couple of things:
1) I like the idea that they are guaranteeing a minimum of 70% payout, but without an outside audit of the payout system, I do not know if the guarantee has any real teeth. Again, it is a matter of trusting the provider - which is not a very good business situation. Also, they indicate that they will increase the payout percentage, but are not clear under what conditions this this occur.
2) Apparently, from the FAQ, they payout based upon "keywords' as opposed to actual click-thru, revenue amounts. I believe that this differs form providers such as NameDrive who wait until they receive the actual amount from Google, and then pay out a share of the amounts (from what I can tell, the percentage payout is at the discretion of NameDrive). I personally prefer a share of the actual revenue generated. This whole area is quite ambiguous to me across the spectrum of parking providers.
I think there is still room in the industry for a parking provider who sets out clear contractural terms in regards to payouts and also provides nice looking pages with some distinctiveness.
Rich