He is the owner of this site. He does this for fun, not for you or me or money.
What do you mean by "so many sites are missing"? He updates the maps in the sponsor section several times a week -- and posts a summary of that in the markets section when he does so. There might be some live LTE sites around you that he doesn't know about yet or has a list that he hasn't posted yet... Or there might be some accepted sites on the map that haven't gone live yet, but what it really comes down to is his map gives you a good idea of where there is LTE or 800 etc -- but is by no means a definitive guide.