I find it amusing how all they go great lengths trying to decypher 'secrets' about Max Martin songs and methods. Except that they don't get that his success is so simple to understand, yet cannot be explained by discovering some secrets that actually don't exist. Simple truth is that he is smart and extremely talented for melodies. That's it, there is nothing more. No secrets. Inject yourself a gene for a catchy melody and there you are 
Have to agree with you there. I've always thought this and am amused when I see people trying to replicate Max's style or figure out the equation to somehow "crack the code" on how to make a pop smash. He's talented, pure and simple. And Swedish. That helps. Haha.
I think maybe for someone who is musical but not innately savvy at crafting a strong pop melody, it's tempting to do what Bonnie McKee once described, when she said Max and Luke treat it like a math problem. But I really don't think it's that mechanical. I think the combination of melody, lyric, and production simply add up to an amazing end product. Producers/artists/songwriters should be original