Just curious I've heard this don't effect your adwords account, but say you pause your account here and there will it effect your spending or history? Like your AVG CPC?
I haven't had any problems yet. However, the kinds of accounts I generally work with are large enough volume that they would get 10,000 impressions in the first hour. With an account like that, any negative factor resulting from pausing the account/campaign would probably be overcome before I even noticed. Someone with an account that gets 10 impressions an hour may have a completely different experience. In other words, I doubt it. However, the volume of your account may play a factor.
From what i have experienced in the general run of things is that there should be no effect or very minimal. I do manage small Adword accounts so if there were to be anything noticable i'm sure i would have come across it Nicko
I haven't noticed anything significant that would draw a flag. Obviously, if are paused too long, the market's CPCs can change due to environmental variables, like competition. In closing, don't worry about it. =) Hope this helps.