@MartinB
They have your experience with Now, and/or with countless other apps they would like to run, and they eventually get so frustrated with being locked in the playpen that they exit S mode, with due safeguards like good AV, just as they cast off training wheels on their first bicycle as a child, exchanging a little stability for a lot more freedom.
Set a Payment PIN on your account so that no-one but you can buy memberships on it.
Check your bank accounts monthly for any other unexpected payments to Now.
That way you can at least nip them in the bud, while you and Now figure out whose fault they are.
