It's slightly more complicated than that. Steam was using a payment processor called Bitpay which at the time had gone to one side of the small blocks vs big bl

It's slightly more complicated than that. Steam was using a payment processor called Bitpay which at the time had gone to one side of the small blocks vs big blocks political issue (big blockers went on to form Bitcoin Cash {BCH} and Bitcoin Satoshi Vision {BSV }with Roger Ver and Craig S. Wright, make of that what you will). Coinbase at that time was spamming the blockchain with dust right before the halving and finally got called out on it over twitter. Transaction fees went back down shortly after that.