which bonus ae you referring to?
1) UA-promotion for flying 3 to 6 StarAlliance-partners between sep-15 and nov-15 (5'000 to 50'000 bonus plus Quiz-bonus of 10'000)? You can expect credit for that after dec-15-98. This promotions will be run for LH-miles&more-members from jan-1 to feb-28-99. I have no information if other StarAlliance-partners will run a similar promotion somewhen nor do I know if UA (and LH) will rerun such a promotion in the future - my guess is NO.
2) Or are you referring to the Star-Alliance Upgrade-vouchers (distributed in Summer 98 - to be used till nov-30-98)? I have no information if the StarAlliance-partners will rerun such a promotion in 99 - my guess is NO.
3) My believe is, that some/all(?) StarAlliance-partners will do something special in 99 as a welcome to Ansett and Air New Zealand (in spring 99) and ANA (later in 99).