By far the most OSes installed in business are by MS, can you now clarify why an industry body shouldn't have a pro-MS stand, or would you like them to be anti the company that supplies most of their members' work?

Having said that, without exception all of the people that I know who are in the BCS in one way or another are FOSSers/UNIXers/Mainfram-ers who happen to use MS software as well. You almost certainly wouldn't get very far in BCS if you maintain an anti-anything stance, let alone anti-MS, because it would show how out of touch you are with business needs.

Also why should a working scientist automatically get anything from BCs? The only thing you can automatically get is membership, anything else you have to prove that you are worthy of.

And, their web site does take electronic payments from the usual suspects.