User blog comment:Rossendale2/OMG, Killsteal, Killst- Get over it!/@comment-1836772-20131021235505/@comment-4022742-20131022131639

Getting a 4/0/8 Karma Support in your lane with Supportive AP items is really a blessing to be honest. Things like, and  really flesh the damage out, while still helping the team.

And poking down an ADC from 100% to 20-40% HP in just 1 ->  combination nets your ADC more kills then they could ever hope to get on their own. It's like investing in your future.

(On some champions it's not as beneficial to get the kills though, a fed support does way less then a fed  support.)