I just had a bunch of different Stack Exchange sites open, and I noticed that some but not all of them had a banner inviting me to take the 2019 Developer Survey. Not even all sites in the Technology section, even though the blog post says:
The survey is expected to close on February 12th. If you’re a registered user who completes the survey in its entirety, you have the option to get the Census badge on Stack Overflow or a different technical site in the Stack Exchange network.
I understand that it doesn't make sense to show the (English) survey on foreign Stack Overflow sites, but I was rather surprised to see the banner on Android Enthusiasts which explicitly forbids development questions and not on Programming Puzzles & Code Golf (it has still a beta theme, that might be the cause).
I can write a script to compile a list of sites where the banner is shown, but
I'm lazy I have to pack for a skiing holiday I want to know the reasoning behind which sites were selected
- All of the above
Follow-up question: does the list of sites where the banner is shown coincide with the list of sites where you can get the Census badge?