I think you ought to stop with all your negativity, Tim.
In fact, I have to agree. I don't understand what people have against it...for all the reasons you cited, but also for the irc, which allows us to report problems quickly and get help quickly as well.
I too think it's a great app, and if the bargains notifications bother you (I'm not into gaming), that can be turned off.
Maybe when hdd's were tiny and space was a major consideration the objections would be understandable, but now? Nonsense.
Impulse alters nothing on one's computer and only makes life easier. Thanks, SD for a really good app.