Anyone here can explain more on the CIMB clickstrader promotion:

It stated on the terms: RM8.88 per matched order per session.

If I am buying a same share from 4 buyers, does it mean I have to pay 8.88 X 4? Another thing is RM8.88 is a flat rate?

RM8.88 broker fee is per matched order i.e. you issue one buy order @ x.xx price, and it's matched (disregarding against how many seller).

If you issue multiple buy orders even of same counter in one session, each will be charged separately.

RM8.88 only for brokerage fee earned by broker.
There's the clearing fee and stamp duty, which goes to bursa and government if I'm not mistaken.