As the crypto tab does not charge any amount to register. It’s 100% free of charge with no upgrades available. As long as your browser works, it generates some income for you. Confusing MLM is often mistaken by a Ponzi scheme which is not justified.
So earning money through Crypto Tab Browser is definitely not a scam, but a passive source of income which usually requires a little more time. On the other hand, it’s a better option to earn by referring to your contacts.