Aliens would likely be just as interested in us as we are them. Even if they didn't have a use for our technology, they would probably want to experiment with it. It's even possible that we made discoveries that they missed along the way due to necessity.,(reply>), That's highly unlikely, highly improbable and verging on impossible. I'd probably liken their interest in us to the interest we have towards primates. Even that would be a stretch. These species are do advanced that they can pull space and time. What on earth could we have that they'd want.