I have never seen Latin@ at all (but I also do not speak Spanish). Is that a common a/o replacement?

I find it interesting that the Hispanic LGBTQ+ community would use LatinX. How is this even pronounced in Spanish? Latin-equis? Or is it the English Latin-ex?

Yes in my scene @ and x are both common. I like the @ option.

Like I said nobody pronounces either option because it's unpronounceable. That's why the 'e' is a better option IMO.

You can pronounce it as “Latine”:

https://news.ycombinator.com/item?id=50261926

But then why not just write “Latine”?

Because there are consonants that change their sound before an “e”. So, say, the word “chicos” (boys) and “chicas” (girls) should be written as “chiques” in neutral because the c sounds like an s and not like a k with an e in front… but “chiques” doesn’t look like “chicos”… visually it’s not recognizable… while “chicxs” is much easier to parse. So that's why some people prefer the neutral to be written with an x.