It strikes me that 'sporting' credentials of those racing in this way are somewhat diminished by the apparently overriding need to promote the brand as a financially lucrative entity - by its organisers and those others who consider the need to make money to be of much greater importance than to celebrate the true values of sportsman/woman/person/ship.
I think the 'sportsmanship' you speak of is an English (possibly British) peculiarity. It is where an individual or team takes it upon themselves to interpret the rules in the favour of the sport rather than themselves. I don't know of any nationalities that would agree with it nowadays. It still appeals to me but then I back losers generally!

In view of the rules having been explicitly changed to prevent this particular strategy (calling your second-placed car past the first-placed one) then the Ferrari action has to be rule-breaking - and they have been fined.
I agree with those who say this rule is un-workable and another workaround is needed. Team actions can include getting one driver to hold-up competitors to the advantage their of team-mate which is not banned AFAIK. So team actions are valid in my view. It is certainly the case that we were deprived of the Vettel/Webber wheel-to-wheel stuff that we saw previously.
The fine with no points deducted or time penalties seems ineffective to me. As someone else has remarked, it will just go on the accounts.