This is not accurate. If you add up the total value that upvu pays out, which is 13.7x for the upvote plus the liquid steem which comes out to another roughly 4x upvote value, the total value comes to 17.7x upvote value (not including trx), while upex pays 20x upvote value. Upex will become extremely valuable once/if SBDs start paying out again.