How Much Should I Spend On Ads

Also there are the topics:

https://devforum.roblox.com/t/how-much-should-i-spend-on-advertising/1436/2
https://devforum.roblox.com/t/how-much-robux-are-people-spending-now-a-days-for-ads/589303/107

So to make someone play you would need to put a really good art, it can be a GFX which attracts the most. And it should show clearly what the game is about (Can be in the image like someone driving a car or something).