Reddit userbase is way more hostile to ads on average, more block ads, a lot of the content is non-advertiser friendly, they have less information on their audience for targeting, etc.
Reddit is more forum than social network, they'll need to get creative to make more revenue from users. Winning strategy for them might be to try and get more older users who don't care about ads so much and have lots of money
Reddit is more forum than social network, they'll need to get creative to make more revenue from users. Winning strategy for them might be to try and get more older users who don't care about ads so much and have lots of money