I'm not sure I know what you mean by "this."
Are you talking about the grassroots "database?" I'm sure it is good idea, because more accurate information is better than less accurate information. I'm not sure it will get off the ground, and I'm not sure that we will end up with anything that anyone would want to rely upon. So it may end up being fruitless, that is for sure.
CGC isn't going to do anything. This lack of information has never hurt their business.
And it really only relates to books that are (or were) perceived as scarce and were subject to few signing opportunities.
This database is not really about how many JSC Gen 13 books or Capullo/Snyder Batmans are out there. Those trade often enough and the creators are still accessible so more can be produced.
It is more about Byrne, Frazetta, Koike, certain celebrities etc. where there is a way to get to a really good number even if it is only a close estimation from the sources of the material - so people can say, "well there were somewhere between 100 and 150 total Byrne books done, I know the scarcity, and now I can decide how much I want one, knowing there are only that many out there."
I will say that your position is logical if what you want is a completely accurate, to the numbers account of how many sigs per creator WERE done. Since I'm not sure that is possible, the grassroots database becomes an alternative, and the crux of the issue will be, is the information trustworthy and worthwhile.