When that recruiter message from 5 months ago suddenly becomes relevant because your current project is imploding! The five-month gap between "I am looking for a person to build a data or webdev project with" and the developer's sudden interest is the digital equivalent of finding that one sock you lost two years ago—right when you've given up and thrown away its partner.
Nothing says "my current situation has dramatically deteriorated" quite like revisiting ancient LinkedIn messages with newfound enthusiasm. That "Why lol" response is basically code for "my Git repository is on fire and my boss just asked if I've updated my resume recently."