I stumbled upon Intervals.icu maybe a couple weeks or a month before I signed up.
Reading the home page it isn’t obvious that the site isn’t based on a freemium subscription model. The “sign up for free” sounds like a marketing ploy. I probably didn’t sign up the first time I came across the site because I thought after signing up I would be asked to pay.
It is remarkable, and I appreciate a lot how the site operates on a donation model. If I had know this, I think I would have signed up sooner.
I write my experience because I hope it can allow the site to reach a wider audience.
In addition, I also wonder if a demo option would help people get familiar with the site and increase sign ups.