This doesn't seem like the right way to do business long terms. The off chance that someone actually take you up on it and pay your 'bill', you've destroyed a lot of goodwill and alerted the rest of the tech world of your scammy moves.
Also for those that require a credit card for a free trial, I always use a virtual card and cancel it. It's super fun to watch them cry when they can't actually charge you.
Also for those that require a credit card for a free trial, I always use a virtual card and cancel it. It's super fun to watch them cry when they can't actually charge you.