Every leak makes a serious impact on creators, imagine how much money DPC would make if there was no other way to play Being a DIK other than paying for it on Patreon of Steam.
Probably no more or less than they already do. BAD is a project for suckers, you either have to be devoted to the developer or an absolute moron to support them on patreon. We're sitting at eight months since their last update, which itself was a Halloween themed update that released in December. BAD is a game that has critical mass, it's been going on for years, it is hugely popular, and it is available on a mass market storefront, it's not comparable to a smaller project like Henteria Chronicles. To even use it as an example is foolish. Due to the nature of what it is, it's going to attract a much larger following and it's the kind of project that will attract and chase away supporters in waves. It has nearly 13,000 supporters subbed to its patreon at this exact moment, if every single one is paying the lowest subscription then they're making over $25,000 CAD a month. The actual number is definitely higher and it will fluctuate up and down depending on when the release is due or how long ago the last one happened.
DPC wouldn't necessarily do any better than it already does if the updates didn't instantly leak by pure virtue of the fact that critical mass is a thing. It's a huge project, with a huge following, Henteria Chronicles is a small project, with a small following, and leaks hurt it far more than something like BAD. It's not a fair, accurate, or logical comparison.