Nothing wrong with having an odd number of teams.  But obviously you would try to avoid it, even though every team should face the "blind" team the same number of weeks if the team number was odd from the very beginning.  But once a league is established, why would you want to add an odd team?  It would be impossible to even out the schedule, let alone having to re-vote on the prize fund since new money would be added.  Now teams would have some idea where they might finish a quarter or half and that would obviously influence what type of prize fund they voted for.  Plus this far in, what your team's record be?  Would you really start a league at 0-60???  If a few teams are added in the first few weeks, they can all post bowl each other to make up the games.
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Telling it like it is.

We had a team drop so we ended up with an odd number of teams. Instead of having a bling score to bowl against,we voted that the so called bye team deaw a number of one of the other teams bowling and they were to bowl against their scores. It works,it is luck of the draw.

In the German league system this frequently happens in the lowest league division. Normally, the groups consist of 6 teams and each will make one single game against each other on a league day. In some cases, the team numbers don't fit, and 5 teams will start, each with a blind game.
While thsi yields an automatic win for each team, pins are also counted, so that there is a motivation to score high, since in a draw situation the team with the higher wood count to date will get the better rank - which can be very decisive for next year's division. If possible, this situation is avoided, though.
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DizzyFugu - Reporting from Germany

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yeah, more money the better right?
the reationale is that because one team is bowling a blind, they will have an advantage with the jackpots. they also stated that they didn't wanna recalculate the prize money. i guess in the few days before it starts, that'd be too much effort. stuff like this is probably why membership numbers are down, 3 of the 5 on our team would've been new members.