The proliferation of TD's near the end of the match paricularly fires up Zam herself. With weak bounty hunters, her payout could potentially give you an almost tm lock for her. With being able to go 5 times in a row after someone died and her being likely to go again and again with a perpetual speed up and td's galore, her lead is all about exploiting her own personal tm gain rather than empowering other bounty hunters.
It could be useful in trying to overcome territory wars teams, and possibly raiding as tm gain can be quite overpowering there as well. It could be useful in arena, but you're talking about offering yourself up to the RNG gods like classic Finn-lead resistance.
Let's not forget that we have 2 perpetually reviving bounty hunters now who can make excellent use of this contract, Read: Powers up Bounty Hunter's Resolve.