The requirement for all outputs to be 0.01 or greater was dropped. Instead the dust prevention method is now a minimum of 546 satoshi (~1/3 of fee)
https://github.com/bitcoin/bitcoin/blob/master/src/core.h  line 195

Free transactions have a minimum priority that dictates relatively large BTC amounts or well-aged coins. People can't continuously spam with this rule because they will quickly run out of funds that can be sent for free.