Running a small little research around here. For example, Bitcoin has (or will have) a total of 21 million coins, tops. Litecoin seems it will have up to 84 million coins, total.
In your opinion, when a new altcoin is created, how many coins is just too much? I have seen projects with like 10,000,000,000,000 coins. That looks almost like... a spam coin :/
I think it's not a spam coin it depends to project how many coin that they want to use for their project because they will divide it to everything they need for that project like bounty and for the team etc. So its alright if their coins is billion because that is the need of team to make their project to be good.