I realise that opinion on a specific pool is subjective and prone to change.
My question: If I am in pool A and additional miners join then my share in the pool is reduced proportionately. Additionally, the pool received more block find rewards proportionately. Similarly, the reverse if users leave the pool. My mining reward in the pool is largely unchanged.
If miners join pool B then pool A finds lees blocks proportionately and my mining reward is also reduced. The reverse is also true.
It seems that the most profitable pool, with all other things being equal, is always the pool with the most miners joining? Both because they are not joining pool B I do not suffer any loss (or, they are leaving pool C) and, because the new miners are joining pool A I do not suffer any loss.
It seems like the ideal scenario is for pool A to syphon all users from all other pools and become a conglomerated 'Mining Central'? Or rather, for all other miners in pool B and C to quit.
Please correct my assumptions if they are wrong.