Originally Posted by
NickB
AAUI, if the miles were acquired exclusively via non-flying, then they can be extended by non-flying activity (as long as the activity concerned earns miles). If they include miles included via flying, then all miles earned until the last earning flight can only be extended by (revenue) flying (or earning miles via the FB Amex card in France or the NL).
Thanks. Bad news but useful. All the miles were accrued by flying.