Has The Verge ever written or investigated Jamster?
My other half recently figured out she was scammed for over a year by this company, and it apparently seems to be a pretty common thing.
AT&T just started informing customers of these kind of service fees with texts, but so far the industry hasn't really done anything about it.
They get you to agree to something somewhere, or get your contact information and then bill your carrier $9.99 a month. There's no warning to you (previously) that this is happening unless you pay attention to your bill.
They aren't the only company doing this but they're probably the most well known.