Sites created out of spite, I guess, but someone already said that and it's not always the case.
But...
>>110296>When it's whole byline is that its an 'alternative' to another site.I think these are the ones that have the best chance at success if their motive is good. It's extremely difficult to populate a community out of nothing, especially now during the age of discord.
Imageboards that create a nice CSS and sometimes even nice boards, but forget to give people a reason to post there are also very short-lived. It's a shame, too, some of them seem quite impressive, but it's a skeleton without anything else. I'd think the creators would at least make some threads...