Paid promotions
Other channels and brands pay to post in yours. Rates depend on views per post, not members.
Affiliate links
Deal and coupon channels earn from Amazon, Flipkart and others.
Paid groups / courses
Premium groups for notes, signals (with proper registration) or communities.
Sponsored posts
Brands pay for reach in your niche.
Because advertisers look at views, keeping post views healthy directly affects income.