Same situation: not knowingly 'subscribe' to a 'membership', and discover one year later when I am preparing for tax return in Feb. The 'best' they can do is to refund the last 6 months. The credit card company is nice, but they can only rebut several 'overlapping' month that the vendor has already agreed to refund, so it does not help.
## HOWEVER ##, the security team of the credit card company is really helpful. I can actually cancel my credit card, and they will refund me for the earlier 6 months charges back; so I effectively get a fun year refund back. The credit card company is willing to 'absorb' my loss, they rock!
Recommendation:
1. Keep reporting to BBB on discountbooksale.com's "LEGAL" practice, but practically a scam, since so many people are burnt. They can at least high-light the so-called subscription invite and even in red color so EVERYBODY CAN SEE IT.
2. DO BUSINESS WITH 'CHASE', USE THEIR CREDIT CARD. They earn my, and hopefully yours, BUSINESS!