I know the thread is saying $0 because Zerodium doesn't exist anymore, but there are others. This [0] one for a full chain mobile iOS is at $15M. I agree with tptacek though, the airdrop would reduce the value but you may still be in the low 7 figure range for 0 click RCE.
I don't think this is real. "Full chain Linux desktop" for $10MM? Uh huh.
We recorded a podcast with Mark Dowd a year ago where he said nobody actually gets "list prices" for iOS full chain at $2.5MM (you can make considerably more than that by selling to multiple parties and by selling maintenance) --- and that's iOS, the highest-valued vulnerabilities.
0. https://advance-sec.com/#bounty