But can you request a computer analysis with fishnet anymore? I have a non-patron account and I can't find that option anywhere. Old forum posts seem to talk about it working by pressing Z and being limited, but when I press Z I get a message that it is disabled by default and a link to enable it. When pressing to enable, nothing happens.
It's been a while since I used Lichess anonymously, but I suspect you do need an account to request a server analysis – that way they can limit the number of analyses per day for a user [1].
You don't need to be a patron, you just need an account. One of the many amazing things about lichess is it's 100% free and donators get no extra privileges except a little logo next to their user