The standard trade over $100 of crypto and you get $10 of free bitcoin. I honestly don't like Coinbase as much as pretty much any of the other exchanges, but it arguably does have two advantages. Most importantly, is it has the best "Learn & Earn" opportunities to receive new coins just by learning about their architecture, which I think is very important overall to crypto literacy and adoption. Also, it's probably one of the oldest most secure exchanges, so if you don't mind slightly higher fees, you definitely get the best integration status of any of the major exchanges/wallets. Mainly though, free crypto, and I usually just eat the fees once and transfer to wallets I like more.
It's time to get your Invitation.codes account too 😎