Publish 0x recently put an announcement on top of their page, telling us writers and user to get ready for a switch in unwithdrawn balances of $SOPT and $AMPL into $OP. That leaves us to only have two kinds of tokens in our Publish 0x account, $OP and $ETH.
As I try to figure out what $OP and Optimism Network is, I checked on this site and find out the trend for this token and kinda like it.

The long term trend is rising, and even for day trade per today it looks green :D. So, I guess it is an optimistic move.

Wish all of us fruitfull wealth in Publish 0x under the Optimism Network Era. Thank you for reading.