The reward for achievements is recognition for doing something special. 100 wins isn't really that special, because you are trying to do that anyway. Same with 1000, if you play that long. It makes sense to give gold for doing that, but it doesn't make sense to call it an achievement. I think an achievement should be more like the Funday Mondays, where they encourage you to go out of the normal and try something new and make it work. Or even if you weren't trying to make something special happen, but accidentally do something really cool (like head shot 3 people with one bullet), that's a nice thing to have recorded.