It's okay on a 75% off, especially a $2.50. A lot of times those exist because they aren't recent/popular/big enough to be a featured game. At best you'd get a Pixeljunk Bundle for 90% off, but knowing them it'd probably be more like 80% off, and since it is so close already they may not even bother, and if they did that's a small amount of money anyway. You can always check publisher trends by seeing the price history of their games on isthereanydeal.com to figure if better than 75% off is even a thing. For Pixeljunk, it seems like something that could happen in a Humble Bundle or something but not a sale like this.
It's not too hard to recognize the rationale behind waiting for dailies. I don't get why it is so complicated for many.