In my opinion, if you do CPM/CPC/Facebook marketing for your indie game, you are wasting your money. You are competing with the marketing budgets of industry giants, which are ten to 100 times larger. Your ads won't be seen.
Your effort should be spent convincing influencers to play your game, so that they will convince others. These are not people best reached by advertising.
Your effort should be spent convincing influencers to play your game, so that they will convince others. These are not people best reached by advertising.