Delaware doesn't have a specific auto-renewal law, but the CFA (no specific auto-renewal law) (Del. Code tit. 6, § 2511) plus federal FTC rules protect your right to cancel.
Del. Code tit. 6, § 2511
Penalties: Treble damages plus attorney fees
SubScrub automatically cites Del. Code tit. 6, § 2511 and federal laws