Highly unlikely. Chargeback rates for a free trial with autoship offer is usually upwards of 3% on a transaction basis and upwards of 5% on a volume basis.
So 9 out of 10 customers are satisfied with free trial with auto-ships, then?
Just because they don't dispute the transaction doesn't mean they are "satisfied." More would likely dispute if they knew that they could, and some are just too lazy to pursue a dispute.