Anyway, I've tried sugar before, because I like to actually experiment instead of sticking to the usual dogma and ridiculous box some growers get stuck in. Good on you for wanting to experiment
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I believe I tried sugar once or perhaps a couple times. If you use it, it needs to be very dilute. I'm not even sure the plant would be able to absorb that form of glucose through its pitcher walls and use it for energy to carry on its biological processes/growth. It's feasible though, so try it and tell us what happens. All of my plants are too large and heavily fertilized for me to do such an experiment. Theres no way I could attribute any difference in growth to the addition of sugar. I once tried putting a bit of pure honey in a pitcher, and the honey withered the wall rapidly, likely because the very concentrated syrup sapped water from the plant cells.
Plants are plants. Just because carnivorous plants "apparently" (due to the limited scientific observations/experiments we have made to date) rely on their prey primarily for nitrogen doesn't mean that our plants are particularly nitrogen deficient in cultivation or that these plants can only get the benefit of nutrients through "natural" (this word should be obliterated from the English language) means. Cultivation is about finding out what a plant wants and needs, and giving it just that, doesn't matter where it comes from.