I'm genuinely sorry. I realise it doesn't seem fair, but Itch isn't really a welcoming platform for adult content anymore. The last time I checked, I literally can't sell my game here because of their rules, not because it's my choice. The only reason I still have my game on here at all is because it's a free 'demo', and at least for the moment, that's deemed acceptable by the payment-processing overlords. The update post is available as a 'one-time purchase' with the price matching the current subscription price, so you can avoid all the tedium of subbing and unsubbing. I know it's not quite the same, but I'm doing the best I can with the limited platforms I have available to me.
Also, the lower tiers were originally created to receive the updates as well, but it was a naive and completely unsustainable decision that my inexperienced baby-dev brain didn't think through when I first started this journey. When I upped the unlock tier, I didn't want to delete the lower tiers entirely, so now they're just 'supporter' tiers that receive benefits like polls and holiday renders.