The file type you need almost everywhere is the 23andme format. They don't offer it.
You'd think there's an easy way to convert the raw data to 23andme, right? That's what I thought before buying. Wrong! Note, that I'm a pretty technical guy, I can code several languages, and I did not manage.
The Nebula blog itself has a super outdated "side note" on how to convert their file to 23andme. And it doesn't work. All scripts online are outdated, too.
They also don't tell you what version their raw files are in, or give you any other help.
The height of frustration? The Nebula blog is littered with articles about services that DON'T SUPPORT THEIR FORMATS. So they make you think there are all of these services you can use, and after you pay them to sequence your DNA you find out that HAHA, you can't.
My guess is that it would take them 3-4 developer days, max 1 week to offer their own files in 23andme format. But they won't do it, because they want you to pay their super expensive subscription fee.
I thoroughly regret having paid more money for files that I can't use.