The other was not to leave Boeing alone in that market and possibly force them out of the VLA business. That they apparently succeeded .
Sounds like a Pyrrhic victory to me....
As an aside, it looks like some German retail investors are getting burned by this SIA decision. Article unfortunately only in German, the gist of it is that some German investment funds bought into the SIA A380s and are now facing, ahem, problems... Link here:
Dr. Peters: Singapur Airlines schockt Fondsanleger - manager magazin