OsakaWino

I would normally agree with your interpretation, "one per member" meaning one per account, which would essentially be intended to mean one per lifetime.

However, virtually every communication I have ever seen from GP, especially their T&C, have been rife with grammar and syntax errors and misleading statements.

So it would not be that difficult to interpret the "one trial tier offer" to mean only "this promotion" (for the limited period stated, and the specific Offer Code listed).

Some people have claimed on FlyerTalk that they were told they would be eligible to try another Challenge during the "next offer period" after failing their first Challenge. It would be nice to have some more evidence of that being done successfully (or even better, for a Concierge to comment on the validity of such claims).

Of course, past policy is no proof of current policy, and current policy is no guarantee of future policy.