In reply to Dominique Simonian.

I was going to write something similar. I've been using Citi VAN for free trials like this for years and it has been great. Not only can you set a max allowed amount lower than what they'll try to charge, but you can set the expiration date before the end of the trial.

Virtual Account Numbers have allowed consumers to take back control of their CC usage. I'm very sad that other banks don't offer the feature. I think there might only be one other bank with a similar feature.