impulse purchase are a real bitch... although I don't think I've ever heard intercom.io described as an impulse buy before...
Seriously though. If you've ever built a company, there will be times when you wish you had that extra $60 sitting in your account. Cancel until you are ready.
Most bloggers already use some sort of email marketing software. Having used Mailchimp, I can say that it falls into the category of software that solves the problem but isn't delightful to use. In addition to that, it lacks several features that could make automation easier, so you're pretty much out of options if you want to automate a series of emails.
Convertkit grew remarkably well because it tapped into the right problems. I think people often underestimate how giant of market "email marketing" is.
Just like the best way to live off a 4 hour work week is to write a book about how you too can live off a 4 hour work week.