BingoBen: Is there any written information on how "saturation" effects each tier?
Double answer:
Yes - lots of posts here with information shared and verified by users over the time. I concur with Simon and Marchie!
No - hardly any detailed information by WGT, except one naming a (now invalid) saturation number for Champs and one pointing to a list like Simon's post quoted above in a confirming way.
Mind you that there are additional ways to move up in tier:
- the anti-sandbagging measures (from 2012?) concerning "to win games or credits",
- the "mobile" way by playing H2H and coin rooms and moving up in tiers by XPs (=levels).