Amazon is discounting Prime memberships by $20, today only

Amazon:

Until November 18th at 11:59 p.m., PT, eligible new members can join Amazon Prime for $79 plus applicable taxes for the first year and enjoy member-only benefits and content, including The Grand Tour. Although the price in your cart will show $99, the promotion discount will be applied at checkout. You will be charged when you place your order.

Just in time for the holidays and the new show from the former Top Gear hosts.