Ring game rake calculation

I am trying to figure out how the rakeback value is calculated when playing ring mode on Full Tilt Poker. Does the same method used to assign Full Tilt points apply in terms of rakeback calculation?
Full Tilt Point are equally assigned to all players dealt at a table regardless of how much each player contributes to build the pot.
Also is it valid to estimate the rake back that one has earned based on the points accumulated at the end of ring game session?

There is different rake calculation methods, but no its definetly not related to FTP

Full Tilt Poker calculates the amount we receive for each player by the following calculation: Rake + Juice - Bonus - Player Added - Fees - Fraud - Used Points = Rake.

If thats what you mean

According to Hendon Mob - "Whenever a pot is raked, the amount raked is divided by the number of players dealt into the hand, and that amount is attributed to each player. For example, in a 6 handed game where the rake is $3, 50 cents is attributed to you, of that 27% or 13.5 cents goes back to you just for that single hand" - therefore it is worked out exactly the same as FTP points.

To earn $1 in rakeback you need to have $3.70 attributed to you in rake. At a 6 max table, that's $22.20, and at a Full Ring table that's $33.30.

Therefore, if you are playing 6max, you'll get $1 rakeback every 22 points, and for Full Ring it's every 33 points.

I think

(Obviously sitting at a table with less people on it will mean you need fewer points, so I reckon you could probably round to 20/30 points and get a pretty decent approximation of how much rake to expect)