Unless you're the seller, watching bid costs rise is no fun at all.
Does this scenario sound familiar?
You've picked the main keywords people use to search for your product. Then you enter reasonable bids, only to find some keywords are deactivated and others cost more than they're worth to you.
You might raise your bids a bit more to keep pace. But that's hard to sustain if you're not seeing the returns.
How long do you keep it up? At some point, you may have to withdraw from the race.
