Sometimes these airdrops just screw their participants without even following their own local rule through "sudden announcement blah blah"
I would suggest not trying to pursue bounties anymore since this is not the usual 2015s of crypto where people were pursuing airdrops and generating satoshis from faucets. You might even risk your wallet getting hacked from malware since I even recall some airdrops I joined back in 2017 (there were plenty) and one project in particular just tried infect my device and steal my wallet for obvious reasons.