briggidere - 9:18 am on Dec 8, 2006 (gmt 0)

Hi,

We sort of did this but not to the the extreme that you are talking about.

We were spending about £1000 per day on a campaign, but we needed to find out where the saturation point was for the campaign. We knew from doing searches ourselves that we showed most of the time, so thought it wouldn't be too much more than what we were already on.

We put it up to £5000 per day and we found that we could spend around the £2000 mark. It never got close to the £5000.

As it's been said, you could be hit with a hefty bill if your campaign is at a low saturation level and you set it too high. Even if they billed you until your card refused, they will still have given you quite a bit of traffic so you would still owe them $$$

The best thing to do is maybe keep increasing it on a daily/weekly basis until you are happy with it.