"IN" in the amount of votes a site/server has got, the higher amount of "in" votes the higher the site is ranked in the toplist. "OUT" is the number of clicks from people wanting to visit the site/server from the Arena-Top100 toplist (the clicks are not unique clicks so if the same person visits a site twice it counts as two clicks).
Insert the HTML code on every page of your website if possible. We will then be able to track all hits and visitors to your website for accurate ranking.
No you cannot buy votes, but by becoming a premium member you will get free votes each month that will give you a good head start in rankings compared to other non-premium members! You can read more about what you get as a premium member here: Read more about premium membership!