I also provide this type of thing for friends and family for free (because I love them), and because payment would make me feel obligated beyond what I feel like doing. It sounds like you’ve made them aware, which is good. I also tell my friends that I can see what they watch, but that I don’t. You do you, but your meme suggested something unhealthy to me.

Don’t spy on your users. Sure, you’ll happen to see something once in awhile or when troubleshooting, but don’t go looking. It’s bad for you and for them.