The free shipping offer will be on orders over $50. The best deal in the industry.
I would not call this the best deal in the industry. Morebeer has free shipping over $59 and you don't need to pay $25.00 per 6 months to get that. Albeit the free shipping is not on every item they have, and they don;t give free yeast, so maybe its a wash.
Still - I think the membership is a good idea for the AHS since it will all but guarantee a certain level of business from those members.
Per some suggestions from members here - I would keep in mind that giving members a trip to the front of the shipping line might slow down shipping for non-member customers and may contribute to driving away that segment of your customer base... just a thought.