I have a client I've been working with for over 10 years.
Due to some external factors, I may or may not re-win the client as they've been acquired and that halted all vendors.
in short, they have - to me - what seems to be an unusually large set of long tali keywords, many of them with zero impressions and the bulk - like 99% under 5,000 impressions in the last 5 years combined.
Yes, this group does convert, and show some metrics better than the head words - despite the low QS on these words.
Plus the client insists on zillions of long tail keywords which, of course, very few are searching on.
This is like selling "nouns" and the only keyword that gets a lot of impressions is "noun" and various common derivatives. Of course, there are lots of nouns in the dictionary, most of which are never used. And the client insists on throwing the entire dictionary in as possible keywords. Yikes.
Now, with the new acquisition, they will more than triple these long tail keywords. In effect, my account QS will plummet with the addition of these words - some of which will be winners, but the bulk of them will be well (WELL) under 5K impressions.
I know this is a core issue of strategy for account management (probably for many big accounts), and I know there are proprietary methods for dealing with this - has anyone got any case studies or white papers on how to manage this kind of account where 98% of the account is extremely low QS - and the QS will be going lower soon?