My current campaigns average 5.05%, but I can't seem to get many 8/10 QS or higher even though I'm doign affiliate marketing for authority sites. I'm wondering if it would be better to simply start over with a new account and transplant only my campaigns with extremely high CTR?
Are new accounts heavily penalized? I'm wondering if it would be better to just to stay where I am with my old account. I feel as if my current account is stained with something I'll bever be able to overcome, 5 years of low CTR.
So far it seems that my low historical CTR + old age account is better than my high CTR + young age account.
With that in mind and if you've got the budget, I'd recommend increasing bids slowly, campaign by campaign, and see if you can improve QS before messing with a fresh account. Don't increase every campaign at once because if it does not work, you will just waste money.
The most important thing to remember is what you did to kill your QS in the first place, so that it doesn't happen again. Remember to use your keywords in your ad copy and display URL's to help with the relevancy factor.
Are new accounts heavily penalized?
I wouldn't say it's a penalty, but again, history is a very important factor in your QS.
If you do continue with a new account, I'd also recommend playing in top positions to get higher CTR's and quickly gain a good QS. Reduce bids once QS is at desired levels.