if you're a hacker/builder, what's your favorite arbitrage opportunity you've found/executed on?

building reel.farm and farcasterstudio.com

A decade ago, when Congress pushed for the $1 coin, one could buy coins from the national mint with a credit card while they didn’t charge the shipping cost.

I open 57 credit cards, bought $3k worth of coins each, deposited them in my bank, paid the cards, converted points to miles. Ended up with 9.7M miles on Unite

web3 is my life lolz | learning smart contract security | mod themetakey | fan of visionofviii ether

All over US. Didn’t pay for a ticket for like 5 years.