It is $3kk, however it also says they're giving $1kk to each individual of the team.
"ZERODIUM will pay out one million U.S. dollars ($1,000,000.00) to each individual or team who creates and submits to ZERODIUM..."
The total they are paying out/wasting on this is $3 million.
They will give $1 million to each individual OR the team who submits an exploit/jailbreak to them.
They are also willing to pay smaller amounts for partial or incomplete exploits.