Many products and services (especially digital ones) are often sold via the so-called free-trial offers which allow customers to use the offered services and products for free during the specified timeframe at the end of which they are charged the full cost of the product or service. Such offers also allow to cancel the free trial without any payment.
This arrangement basically allows people to benefit from the offered services and products without paying for them if they cancel their free trial at the right time.
Therefore, my question is: Is one allowed to use such a free trial offer if one intends to cancel it before the trial ends and has no intention whatsoever to actually pay for the services or product offered?
In particular, what would be the halacha in case with digital products (online courses, etc.) where the seller does not seem to experience any loss due to the free trial he offers?