All the games I've bought in this sale have been ones I was waiting to get cheaper anyway. The thought of buying them just to get the achievement is just silly.
That said, there have been a few occasions where I've noticed a game in the daily achievements list and gone "oh, I'd forgotten that game existed, and now it's an awesome price, I think I'll have that".
That said, there have been a few occasions where I've noticed a game in the daily achievements list and gone "oh, I'd forgotten that game existed, and now it's an awesome price, I think I'll have that".