The female lions do all the hunting and then the male lions just lie around all day....

I read this game advice that said if you get a woman to invest in you she wants a payoff. She buys you stuff, she does chores for you, ...basically you make her work and then she starts looking for sex as a payoff. This kinda sounds like a pimp. What do you guys think of this? Valid game? Because usually a guy takes a girl out pays for dinner and is looking for a pay off.

If a woman is doing all that for you, and expect sex as "payment", two things have clearly happened.

First of all, you are fucking awesome in the sack.
Second, she has probably developed emotions towards you because of reason one.

Now, I don't think there's anything wrong with this, as long as it's clear from point blank that this is only a fuck buddy kind of thing, and she understands that it's not a monogamous relationship. She is just more invested in you, than you are in her. Simple as that. She buys you stuff and takes you on dates because she is afraid that if she doesn't, you'll find someone who will, and she'll lose the great sex.

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Alea iacta est - The die has been cast