Originally Posted by andywaw

Basically, the rule is that *G gives you AN ADDITIONAL bag on the ticket which includes a bag allowance. Zero bag doesn't give you "additional" bag, so it cannot be claimed as a rule.
However, as a sort of a good will gesture, on Economy Light fare on a long haul flight (or a booking with a connection to such a long haul flight), which normally doesn't include free baggage, LH / OS / and LO on Economy Saver will check in one bag for free for *G, provided the bag is checked in at the airport and wasn't paid online.
​​​​​​LX, at least the officially, says "no" .