Two weeks before your subscription expires - they auto-renew if you didn't disable that function. I didn't disable the goddamned function and - of course - they auto-renewed me for the Cadillac plan that's $160 a year. My perfectly fine cheapie plan was $60.
I'm in the process of trying to get a refund and I'm not enjoying it.
When I tried to renew my three-year plan with Nord, I wasn't able to since it was only available to new customers, but when I tried to cancel my subscription, I got a "Please don't leave, here's a deep discount!" offer. Keep that in mind folks.