Probably not interesting for most people here, but for people in Europe it may be.
Take 4 flights to earn 10,000 award miles, or
take 6 flights to earn 15,000 award miles, or
take 8 flights to earn 20,000 award miles.
Says it's targeted. May work anyways.
Link here:https://topbonus.airberlin.com/web/tb/promo-MCV41704?promo=MCV41704&user=201116958&time=20170427035646&hash=cd2df4cc63664e19f718f72c702e1f453f489681&utm_source=tb_en&utm_medium=email&utm_content=tb_button&utm_campaign=tb_kickbk_v4_us_20170428
ETA: Can't appear to get it to work when taking out personal info. Try looking in your account details by promotions or searching your email.
