Well, in order to find out when the author releases an update, a subscription is not needed. At least for Tier 4, the author will only post a link to a game update or comics. The titles of published content can be read without a subscription.Thanks for the update!
If he's going to release the game this month, I'm going to buy Tier 4 definitely. It would feel guilty to wait for the game to be leaked after seeing the efforts he is taking for the game!
And as you can read above, Tonkatsu is not sure if it will release an update in June. But he will strive for it.
And the rest I fully support. If there is an opportunity to support, then it is worth supporting the author.
Sorry for my English.