AI and ML users are massively benefiting from open source but too often refuse to release their data. It's like we're back in the middle ages and alchemy is back in style.
Judging by how the model and site are put together, I think this is some software engineer's hobby project. Not wanting to spill their secrets doesn't make them a megalomaniac for the same reason being a magician doesn't make one a megalomaniac.
Except magicians do actually share their secrets; there is an active trade around it, conferences, discussions and lots of reading material available. The barrier of entry is higher than any old open source project but it's not inaccessible and comparable to alchemy.
I was talking about ML in general, not just this project. See OpenAI and their latest release for example: no public product, no trained model. Just alchemy.