Maybe scam is a harsh word, but it's rather shady:
This unannounced change was placed at the point of order completion where and leads to a $10/mo discount coupon scheme unrelated to the sold shareware. The way the offer is presented is deceptive - after the order is complete, they show a button with the word "Continue" on it. It looks like you are supposed to press the button to complete your order. Instead, you end up paying for something you probably didn't want - and it's a recurring charge.
Flea Circus Games