Say you're running a campaign and it's profitable on auto-pilot.
You're the top bid at 0.10, and life is good 
All of a sudden some douchebag bids 0.15, and a bunch of people follow suit.
You think you could still profit at 0.15, but obviously your ROI is a lot less.
What's your bid here?
Do you match the top bid and hope somebody doesn't up the ante again?
Do you bid for a 2nd/3rd spot and hope nobody raises bids again?
Do you just stay at 0.10 and hope that people lower their bids again in a few days?
What's the strategy here? 
Update:
I've matched the top bid (there are 4-5 of us around this bid) and profits are rolling in again lol.
Im crossing my fingers nobody raises bids again.
Bidding wars are a common occurrence. Congratulations on winning that battle for now!
Here are some old but good threads on the topic:
https://stmforum.com/forum/showthrea...ic-bidding-war
https://stmforum.com/forum/showthrea...rs-like-a-boss
Hope that helps!
Amy