For pretty much all real smaller languages the alphabet and writing concepts was a mishmash of other, more developed languages that their educated people happened to know. And usually the early versions were horrible, horrible mismatches trying to fit a square peg into a round hole; multiple sounds mapping to a single 'proper' letter, making up new symbols, making up new writing concepts to represent peculiarities of grammar (and then finding out that these concepts don't really work).

There are languages that have tried multiple very different scripts - depending on time period, latin, cyrillic and arabic-style; with different writing styles of the exact same spoken language having almost nothing in common if they were developed in isolation because of differences in location&country.

Kinda.

Probability one - it's a joke/hoax/fun. Hence it's unique and no one has any idea about it in current day. The small group of people who created it had a laugh and are long dead.

Probability two, it's a bizarre exciting new language we know absolutely nothing about in anything else. It's freely available on the internet for everyone to see, incredibly popular and know around the world and looked at by many experts in many fields for years. And now someone has decoded it! (In a paper yet to pass peer review?)

I'd go with one myself and I think the reason people chose two is because they don't really get how much people in the past and in other cultures are just like us, they like funny, silly and fun things too.

Choosing two doesn't really make sense and I'm just putting my opinion out there why people do.