Duane Hinton
Registered
Win percentage combined with average innings give you your innings per game in matches you win.
Your rank is based on your best 10 out of your last 20. Tourney matches count as 2. It is certainly possible to have a very high winning percentage and keep your rank, but you will be within one match with low innings of moving up, or possibly as a result of a good league owner.
Holding people out that you know are likely to move up may be considered poor sportsmanship, as the goal should always be to win as dominantly as possible. Its mot against the technical rules, but a good owner will be keeping an eye out for this and address it. You get the chance to address it yourself by certifying skill levels before the LTC. This is assuming they players are playing at a level above their rank, which you seem to imply. If not, then no worries.
How on earth can this be poor sportsmanship? You need to explain this statement.