It's not about being jerks too, it's about being able to compete. They can't compete by giving away free stuff to competition when the competition refuses to do the same which gives the competition an unfair advantage (in this case, MS customers being able to use both gtalk and skype inside of outlook but Google customers being unable to run skype inside gmail, this makes people just want to use outlook as it provides more than gmail thanks to MS unwillingness to open skype, see the difference?).