Been getting the same issue.
Gone over all the settings. The popups happen on two different machines. I'm subscribed to both.
It's been reported as a bug. This is bad programming, bad sales, bad business. I pay to NOT have ads. This includes yours. Send it by E-mail. If I like it, I'll take it.
I'm subscribed to your service because I've had it for years, it works, it had features, it runs lighter than your competitors, and it wasn't getting in my face. The last point, it's doing piss poorly in.
There's no excuse. You are not making a nice promo, it's not worth the hassle, and if you want to save money, try seeing if management will hire new marketing, sales, and even management to replace themselves.