The 1050 were not "lost" - they still count to lifetime status - it is just that the 1400 was not reached in the membership year, so when the membership year reset, the year to date status credits reset to 0, as they do for all members.
the OP still attained/retained Gold with those 1050 anyway.
That's a fair assumption to make IMHO. Everyone's circumstances are different.
I'm sorry you've totally lost me with this one - it makes no sense whatsoever. Why on earth did you even come to pick such a ridiculous routing?
Plus Nadi is NAN, not NAD so you're confusing things with an incorrect airport code, but why go from PPT-SCL? or did you perhaps mean NAN-PPT-LAX-SFL-AKL ? that would make somewhat more sense, but is a convoluted routing and as you said has a huge price tag. None of thise helps the OP with his quest to max SC's for the lowest price either and additionally QF flies almost zero of those sectors you've mentioned, so the SC offer would be irrelevant! eg: SCL-AKL-SYD would have to be a QF codeshare on LA, SYD-NAN would be a code on FJ, NAN-PPT-LAX I have no idea who even would fly this.. maybe FJ/TN and LAX-SCL would be on LA.
I'm sorry Pooch I understand you are well meaning but this suggestion actually meets zero of the criteria of both the mentioned bonus SC promo (which I note has now expired anyway because it was a short booking window) or a cost effective SC earner.
Markir I hope you managed to find something to book to take advantage of the 50% SC promo to get something out of it. I do tend to agree with some others that mauybe your travel patterns may not make the effort worth it fully but only you can decide on your budget, future travel plans and how you may make use of any status accrued.
best wishes