Complex sentence: For the content buyer, Bitpass worked like a pre-paid telephone card: the buyer signed up for the service and put money into an account using a credit card or PayPal; this stored value amount could be used to purchase digital content or services.
Split into simpler sentences: For the content buyer, Bitpass worked like a pre-paid telephone card: the buyer signed up for the service and put money into an account using a credit card or PayPal. This stored-value amount could be used to purchase digital content or services.