This isn't true. a TL7 toon could kill heck spots just as fast (meaning stay with or beat spawn time) as a kiting NT. I know because I did it on a TL7 (non-220.. think she was about 205-210) MP and saw MANY title 7 toons farming elysium hecklers as well.
I think it was a ridiculous way to make credits.. what I don't get is why Funcom put the same thing in S10 after the explosion that occured when ingots were removed. I think the ingot situation and the bounties in S10 can be compared like apples to apples.