The Aerolineas Platinum requirements are now on the English language website:

To reach this category you require to meet with some of the following requirement within a twelve month period:
- 50.000 air miles or
- 60 air segments or
- 30.000 basic air miles and 30 air segments.

http://www.aerolineas.com.ar/arg/mai...20&idIdioma=en

Given that they apply the 500 mile minimum to DL flights, if you flew 30 1,000 mile trips in a 12 month period, that seems to be one of the quickest ways to get STE+ if I'm reading that right?