I got an email today (from Roku) saying I am eligible for a free 30 day trial for HBO maxx. When I click the link, it says I have to pay the monthly fee. I call Roku who says they don’t know anything about it, just repeats the info in the email, and to call HBO. I call HBO, who says they don’t have any free trials going on right now (even though I got the email today. Is there a free trial or was the email sent in error?