That money also goes straight to the single developer who has committed to this app for years.
I was happy to pay the money because MailMate is excellent artisanal software that offers unparalleled features and power. Why pay that kind of money for a mail app, when Apple provide Mail for free, and I have access to a good web app for Fastmail and Outlook for work email? I have bought a license for MailMate - a mail application for the Mac.