Curious what you are referring to. I often try to find the optimal calendar app, and while I know Fantastical isn't it for me, I am curious if there is an overarching story/reason why that I'm not aware of.
Fantastical and Drafts were the two apps I used daily. The developer needing to get more money from me completely ruined my ability to use the app in the same ways I could previous, without having to constantly decline/ignore the 'upgrade' options that I'd actually already had previous.
It's then I knew, that supporting small indie developers is just as risky if not more so, than a large company. I've since never put my eggs into any app basket without seeing the woods through the trees and avoiding the inevitable.
For actual users of Fantastical 3 and Cardhop 2, it's been nice to get new features without having to wait for a Fantastical 4.