Do you think that buying slots on this kind big websites is a good idea? Maybe much better will be spend this money on ads at Social networks?
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Do you think there's more traffic you can get on social media? Since you need to target those crypto users before gaining some good results and provably the one you can see the ads there are not much on crypto. So best try to advertise first on big crypto sites like etherscan or maybe coinmarketcap since provably you will get a traffic with real crypto user guys out there.