As I've said numerous times, this is false: see the attached image. You can set a monthly maximum on Patreon pledges to a Per Update creator, and that does not have any effect on Patreon's functionality. Anyone in the Bunny Tier sees all Bunny Tier posts, which is all you need to access the weekly builds. We only use it for determining how many votes someone gets in the patron surveys.
The only reason we are a per update Patreon is that our Patreon was originally for our art and stories, not for ToA. We had the Patreon for over a year before ToA began development. At the time, we posted art for free to hentai foundry once or twice a month, so we made it a per-update Patreon so people could incentivize us to post more often if they wanted to. Based on that support, we started to post four guaranteed updates a month, split between art and stories, and we've continued that since then. When ToA started development, only one of those four updates were ToA-related; now all of our work is put into ToA.