A 2.8x price increase (compared to what I pay per tablet) for a product made and packaged in the US compared to a mass manufactured product made in a cheaper country by companies with thousands of other products and massive marketing departments seems completely normal.
The thing about Hank Green is that he has been doing this sort of stuff (good things) for long enough time that I don't have trouble believing that this stuff a: pays fair and not over inflated salaries, and b: all the profits really do go to charitable causes.
I also don't think Alec is getting paid per sale, maybe he got some kickback for the consultancy, no idea. He would be obligates to disclose if he was getting a kickback, so I guess well see. If he is lying about such an affiliation, these things have a good chance of bubbling up especially for a channel the size of his.