You can target people based on their income

Particularly if you are using Facebook Ads, their database if very accurate in knowing people’s income, this will help you target people who can actually afford the product and service you offer. If you have a B2B product/service, figure out their funding stage (Bootstrap, Pre-seed, Seed, Series A, B…) This is a great technique to improve the quality of your audience and the effectiveness of your targeting plans.