I just started with adwords and it's not the simplest program in the world at the start.
It seems the minimum is .10 cents as a default but I would like to pay a penny for words that have no adword ads as of yet.
It takes computing resources to keep track of a keyword. The vast majority of Google searches do NOT have bins to maintain statistics. There is no practical way to go back in history and retrieve the statistics for a keyword that has never been used before. A rather large percentage of Google searches (I think I'v eseen 20%?) are actually unique, and have never been used before.
There's some evidence of a capacity crunch in the restrictions on accounts - 50,000 keywords, 25 campaigns, etc.
I'd conjecture they don't want to waste their resources tracking hits on keywords that may or may not ever produce .01 income.
.20 seems to be the absolute minimum for any "virgin" keyword. That can go up, to as much as $5, more more specific virgin keywords. (The broader the term, the lower the price, at least for virgin keywords.)
The price will tend to go down once the keyword is used.
However, this creates a big problem in a lot of cases. For example, you can have a newly published book whose title is a $5 keyword. That's a big problem if it's a $10 book...
I would "guess" 8 to 80 of the 795 searches a day would click thru. (1% to 10%)
It's good business for Google to make the customer bear the cost of the "research" on the CTR of a particular keyword.
But I know 3 to 5 cents is where the price should be to make a decent ROI. At 10 cents I lose money. So Google makes NO money.
BTW, can I bid 3 to 5 cents (or less) for existing keywords?
Good CTR, then it's a lower rate...
Or go up. Definitely one or the other.
Unless it stays the same.