[tmp65535]

Similarly, I've been writing respectable software for decades but I'm fairly certain that my most widely used piece of software, by a wide margin, is a mildly pornographic app (http://driftwheeler.com)

This app, published in 2017, has a continuously growing population of users from all over the world. I get email every day asking whether soft1 is the only server, thanking me, suggesting improvements, etc.

It's ironic, and there is a lesson to be learned here.

[alien_]

It's just a numbers game. The total number of people who consume porn is probably many orders of magnitude larger than the audience of your respectable software, so even if you're tapping into a very small niche of porn consumers, it can be enough to overtake your other software.