Got 200 GP instead of 300 which it clearly says +50% more what is this :p i only purchased it to get 300 not 200 :p

The 50% more is already calculated in. If you bought it at 20 GP at a time or $3 at a time you would have spent $30, as opposed to the $20 you spent to get the 200.

It's not 200 then another 50%. 200 gp for 200 fb credits is 50% more than you would get if you were to buy the 20 gp for 30 fb credits (the base price) ten times.

I wont say im not sad about this but ok ty for the help