GameRank is a living leaderboard for games, engines, assets and tools. No algorithm, no ad account, no accounts at all — rank is simply what you've paid.
Right now: 0/h going out to ranked projects.
Higher spend means higher placement, and nothing else does. #1 overall costs $5.
$5 gets you on the board. A dollar more than the project above you puts you above it. You only ever pay the difference. One bid ranks you globally, on your engine board, and in your category.
Read the rules