I don't think this has been mentioned here yet (?), but there is a raffle for those renting from Herz this year (or if you already have rented from them)
https://www.finnair.com/gb/gb/hertz-100-raffle
"Hertz Celebrates its 100th anniversary with a Finnair Plus award point raffle! Enter now for a chance to win 100,000 points.To participate, you just need to register on this page and earn points by renting a car from Hertz during 2018. You can participate by renting a car by 31 December. If you have already rented a car from Hertz this year, you only need to register on this page"
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Entry period
The entry period is 1–31 December 2018. The participants must register to the campaign before 31 December 2018.
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Prizes
100 000 Finnair Polus award points will be drawn among all those who have participated in the campaign during the campaign period 1–31 December 2018. If the winner is a Hertz Gold Plus Rewards member, the winner will also win an upgrade to the next Hertz Gold Plus Rewards tier for 2019. (Tier upgrades are not available for Hertz Gold Plus Rewards President’s Circle.)