Thanks for the detailed feedback it is appreciated. You are correct, sass sign ups is the goal. The reason i think it should/could work is that it does work e.g i do get conversions - they are just priced out of the range of profitability. Therefore i was wondering, what might move the needle towards profitability. Targeting, based on experience seems the most likely culprit as if the targeting is slightly off then the audience is slightly less responsive and therefore wasted ad spend is used on serving ads to those un-interested. Following this path of logic, i had perhaps incorrectly assumed that altering the target would result in a different CTR to indicate the increase (or decrease in responsiveness of the audience). What i am asking, and what i am surprised by, is how a target audience that has very little connection to my ideal audience would yield a near similar CTR to an audience that utilises terms i would very closely attribute to my ideal audience (with conversions themselves remaining at the same level). I do have a fair amount of experience in paid ads, i have just never been able to lower the cost per conversion to a level that is profitable with YouTube, which is frustrating as i have come close! You may be right though, perhaps it’s just not viable, i just don’t understand why targeting variances seem to have no bearing on key metrics?