Arkansas doesn't have a specific auto-renewal law, but the DTPA (no specific auto-renewal law) (Ark. Code § 4-88-101) plus federal FTC rules protect your right to cancel.
Ark. Code § 4-88-101
Penalties: Actual damages plus attorney fees and penalties up to $10,000
SubScrub automatically cites Ark. Code § 4-88-101 and federal laws