Do you mean trial offers for different lengths of time are illegal?
Yours seems to be for 30 days.

"•1-month warranty on this account. Please create a ticket and reply with your order ID to get your replacement account"

Example: (Don't feel like posting all)

Netflix
https://www.netflix.com/signup
You won't be charged until after your free month. We'll remind you three days before your trial ends. No commitments, cancel anytime.

Same as your offer, (Cheaper by $X.00 ) They are inconvenient by making you cancel.

I really don't care, feel sorry for those that do.