Usually an "even bid" is made to avoid being set when holding an awkward hand.
Occasionally, a situation arises when an even bid can be made in order to make a significant gain on the scoreboard. The beauty of the "even bid" is that when one person is 'set' so is a second. Holding a hand with Wizards and/or Jesters and few "uncertain cards" you may wish to make an "even bid" with the intention of 'setting' others.