GameMasters Only

How much effort do you put into worldbuilding for your games?

Enough to get myself hyped for the game and want to choke the life out of players if they ditch the game.

More than players put in their characters.
So arbitrary small amount but not quite zero.

As much as the campaign benefits from.

I've run high-narrative and fairly linear campaigns where I prepare characters months in advance and choose theme music for enounters, I've run post-apoc games where we roll up the setting as a group on the day with 0 prep.

Way, way too much. I'm writing what more or less amount to encyclopedia articles for each race, each one exceeding ten pages. And that's just biology and psychology--cultures, which don't necessarily follow racial lines--each get their own article as well.

to simplify things I usually make cultures and religions follow racial/ethnic lines

I'm trying to build up a wiki for the setting, so I suppose it's fairly substantial.

Do people normally organize their more elaborate settings via wiki or other note-compiling devices, like Zim/Evernote/Laverna?

I use Google Docs

How are you building a wiki?

GDocs has been decent for group sharing and edits.
How are you keeping the documents themselves organized?
I found it tough to keep information in hierarchies.

Obsidian Portal and Wikia both offer solid foundations for stylized page-based organization (with lots of article linking for easier reading). Obsidian Portal is much more specialized for TTRPG purposes and thus harder to customize but easier to manage things like maps and character [sheets!].