Ofcourse not fair , they dont want profitable frequent short term traders period . Because only few dozens of those scalpers will wipe out all CS's profits !!
Who is talking of fair with SB companies? Scalping with them is not worth doing. I don't know why they do not encourage it but, apart from that, the spread is prohibitive. I have been using an SB company for years but go for more than a few points, otherwise you start overtrading and giving money to the SB company.