I tried signing up for Inflow, but noped out when it asked to fill out survey questions and supply an email address.
I bookmarked it with the intention to go back. However, I know realistically I won't.
Not the craziest designed-by-marketing thing I've seen, but up there. But hey, it's not like I'm looking to them for UX advice.
It's not even clear what you are signing up for, and they start asking a bunch of personal questions...
My ADHD brain noped out of there in an overwhelmed browser closing act of defiance! :-)