We have clearish pricing on our website (the options are a bit confusing because you can self-host or pay for hosting), but we do have our enterprise pricing available for someone, and you can buy it with a credit card.
In my four years there, we've had exactly one purchase of enterprise via the website. But every enterprise deal that I'm aware of has researched pricing, including using our pricing calculator. Then they want to talk to understand their particular use case, nuances of implementation and/or possible discounts.
Maybe FusionAuth and its ilk are a different level of implementation difficulty than keygen? Maybe our docs aren't as good as they should be (the answer to this is yes, we can definitely improve them)? Maybe keygen will shift as they grow? (I noticed there was mention towards the bottom of the article about a short discovery call.)
All that to say:
* email/async communication is great
* meet your customers where they are
* docs are great and clear messaging pays off
* devtools at a certain price point ($50/month vs $3k/month) deserve different go to market motions