you can thank itch.io for that... there is not much more Lemon can do for us, it is already really nice to give it away on a 50% sale considering how much every single patreon supporter is paying compared to itch.io users.
Just get it as long it is still on sale, it's worth to support Classy Lemon this way. I've got season 2 for the normal price of 10$, I see no problem to pay another 6. Compare it to other payd releases out there for more than 20 $ and then compare the quality of most to VN like Project Passion or Eternum. It's worth it :)