[xdude]

I tend to agree about search volume and SEO; but it's a double edged sword. Lower volume search terms are easier to rank, but yield less results. Higher volume search terms are harder to rank, but yield more results. It may be inexperience talking, but perhaps a combination of the two would give the best chance of success?

Remember we are talking about a free service so it's little easier to rank than with highly competitive keywords like Web Hosting or VPS Hosting. There aren't many real free hosting providers ranked for those keywords so it give us even better chance.

I know we can't do a real SEO process here. But, There are several simple techniques we can use for these. For example we can create a 'Vibe'. This is how u do it,

01. Make a list of practical keywords. Phrases people use for search.
02. Check first 4-5 pages and save urls of page where you can leave a comment.
03. Then write a small comment about Post4VPS. Not copy and paste but something different in each page.
04. Don't use Post4vps url. All you have to do it mention the keyword 'Post4VPS'.
05. Share the list with others who are willing do the same. But never post the list in public.

This doesn't have a huge impact on ranking but it does have a psychological impact on those who read comments in those pages. They see the word in different places and start wondering about it. Also it helps on Google bot in a minor way too since it pick up the keyword in many different domain names.

Your idea about FB is good but carefull not to spam. There are other ways to do it too. Create a FB group like 'Game Server Support Group' or 'Game Server User Base'. Post about related stuff and leave a pinned post about Post4VPS  give aways.