I'll put my two cents in. While yes, boosting your application does put you in front of the the line it does not mean you'll get in faster if you're not familiar with the rules. Paying money doesn't get you into the server, your knowledge and understanding on the rules is what gets you in.
With that being said, there are plenty of servers that cost 10x as much to get whitelisted.
Running a server that can hold up to 1500 (I think that's the new limit) isn't cheap and in all reality you need to atleast make your money back to make sure that those returning 600 people that play on the server daily have a server to play on.
With the server running the way it is, with almost daily updates from hard working developers I don't see an issue with someone spending a bit of money to get to the front of the line. No matter what the people who understand the rules and have a good understanding for roleplay are going to be the ones that get in first.