I liked the Free monthly card trial that came around the same time as this Legendary event. The actual value of it (2.99/month) really isn't bad, so I was strongly considering doing it. I still I thought 1800/month kobans isn't great considering epic pachinko is 5400 kobans (3 months worth with the card). Again despite this, I was still going to go ahead and get it.
Now however, considering how bs this event was, how much koban you would have to have wasted (so monthly card wouldn't have helped at all), etc.; just out of principle, I will no longer consider the monthly card. Therefore as a consequence of this scam event, they just lost out on money themselves. I also really hope others seeing this will follow suite and not get the monthly or cancel theirs, in order to stand up against this.