No no no, you need to defend your "hundreds of millions" fantasy.
Would you have claimed an even higher number if you thought you could get away with it?
No, I was going by what I thought was common knowledge- estimates are wide ranging, to be sure, from 50m to 500m... in that range, "hundreds of millions" (ie 200m or more) is not unwieldy.
In the interest of brevity, I will reply more fully to wagglebee, who has offered up a well fleshed argument down thread from the one I reply to here- I will be sure to ping you when I reply to that one...