Kristian: Which part? Don't people care about incentives?
Yes, like getting on the bundle to make many sales. HB can demand cross-platform and DRM as usually, saying that this was only a one of bundle., or special themed bundles only.
Kristian: Wasn't Humble Bundle a huge driving force for getting new games ported to Linux?
Debatable - the movement was there before HB, and there are also other actors, like Steam wanting to start with Linux compatibility. The impact of HiB is unknown.
Kristian: Won't the huge success of the THQ bundle lead to future Windows only bundles?
Maybe. But it do not need to change HiB's, but open up the possibilities of more themed bundles. This is not necessarily a bad thing.
Kristian: Won't developers otherwise hesitant about porting their games to Linux wait for those future Windows only bundles?
Not if this a condition set by HB to be included in the next HiB. Any way - future windows only bundles will be windows only. This do not mean every bundle from now will be windows only, but there may be more bundles (which is good!)
Kristian: Isn't it the case that that would have been impossible if Humble Bundle had continued on with a strict cross-platform only stance?
Not at all - this things are not mutually exclusive. Most people tend to be very good making distinctions and not treat every situation as polar opposition.
Kristian: Isn't it the case that if Humble Bundle has kept their strict cross-platform stance some developers would have been conviced to bring their games to Linux just like they did with for example nearly all games in Humble Android Bundle 3 and Humble Indie Bundle V?
it is more likely to happen because of Steam aiming for Linux market right now... Anyway, not all games are easily ported, and a to strict restriction will in the end exclude some by default.
Kristian: Isn't it the case that people want to be treated fairly and equally?
Yes, but for some reasons you are set out to make sure that some games will not be done so - i.e. those which can not be ported and those to tied up with steamworks
And that is mine facts.