Anyone can charge whatever they want for the product they are selling. Its their's to price.
The following quote from Dan Harden captures something fundamental in my opinion:
I do think that more than anything else, this is about branding and identity, the entity being branded is "Aiki". Which of the following is easier to market: "Dan Harden's training method" or "Aiki"?
Well, I think that was just an example.
As for "Aiki" - Dan has just as solid an Aiki lineage as anybody posting here. Not to mention the Aikido folks who call what he is doing "Aiki".
Do you object when other people here say that what they are doing is "Aiki"?