I doubt that you would have the same earnings as with LX.
If you would buy the cheapest Y-tickets(Around 100 + 2 x 150 Euros for the upgrade) and then add the 3 x miles campaign on your commuting route that lasts until December, you have a easy 15 000 statusmiles for only around 400 euros intra-europe! It's a to good deal to be OS. Would be nice if someone could have this confirmed, or should I rather say unconfirmed.... : 0