a CT with a turns ratio as low as 50:1 has a voltage induced in the secondary even at no load.
Actually I use a buffered voltage bias as suggested here.This is a better method than the resistor voltage divider that you suggest.
You miss the point. No biasing is required for the ads if used in differential mode. Biasing is only required if you are using the ads in single ended mode and measuring with reference to ground.
Increasing the number of turns merely increases the induced voltage in the secondary at no load.
Actually, I am using a 50W 1% tolerance resistor which is enclosed in brass (see attached photograph). Chances of this resistor catching fire are pretty slim. It is not one of those cheap ceramic things which you probably have in your mind.
As to your other comment a CT with a turns ratio as low as 50:1 has a voltage induced in the secondary even at no load. This induced voltage causes erroneous readings.