This pump was not really due only to coinbase listening.
OMG was an ERC-20 and they have recently moved to their
own network , launching their main net in June 1st. This would already be a pump by itself, and it was combined with coinbase listening...
I am not a fan of this project, as I believe it is basically a scam, as their goals are unachievable by them imo and they hype themselves a lot. They propose a very efficient scaling solution for ethereum network. They also distorted the truth a lot of times, to make it looks like they were
google partners while they were not (Google were adversting that OmiseGo uses google, not that google is interest in omisego).