You think that you will get a valuable service for free. What you actually get is lured into investing time and energy creating something of importance to you (an invitation to an event) which you find out, at the end, cannot be sent unless you allow tacky ads to be included in the card. The alternative? Pay Punchbowl $85 dollars -- an extortion fee, lest you loose the work you have done and have to start over with another provider. They could explain up front the terms of the agreement and let people decide for themselves if they want the product for the price. That is what an honest company would do.
We're sorry to hear you feel this way. While you do have the option to upgrade to a paid subscription to unlock all of our membership benefits (such as an ad-free experience), our platform is completely free. We do our best to make this clear. The cost you mentioned was for an annual membership. Monthly plans are also available.