I've been on ebates for years. You will see the money.
I just booked a single night at AoA through Orbitz. It was a measly 1%, but the cash showed up quickly.
However, that doesn't always happen.
Sometimes, you can do the "Where's my money?," and it instantly gets credited. However, there have been times where I don't see the money in my account for weeks. ebates once told me that it has to do with when the company (Orbitz) credits ebates with the sale.
Sometimes, I don't see the purchase in my account. Some companies seem worse about this than others. Walgreens, for example. I almost always have to do a tracker with them.
But in all seriousness, just be patient but diligent. Do a track if need be. Contact customer service if it's been a few weeks.