I will not offer any advice as there are better players than me on this forum to do so.
I play mainly freerolls and low level sit and goes, I started on
Betfair and played 10 games during which my winnings were £9 from a stake of £10 + £2 charges (20%). I therefore lost £3.
I then moved to a site where I play $2 + .20 (10%) charges, I have been playing there for a couple of months and am currently showing a profit of $5.80.
If I had been charged 20% I would be showing a loss.
The one thing I know is that I am playing at the correct level for my capabilites, if my profits increase I will move up the levels, if not I will continue to enjoy my poker.
Have a Happy Christmas all.