I like free miles, and that’s exactly what Lufthansa Miles & More is offering right now. Lufthansa Miles & More members who download the Miles & More app and log-in for the first time by September 30, 2017, will receive 500 bonus miles. There’s no registration required, and the bonus miles should post automatically.
Typically I share these deals because getting a small sum of miles can help you reset the expiration of your mileage account. However, in the case of Lufthansa, miles expire 36 months after they’re issued (unless you’re an elite member or have their co-branded credit card), and that’s regardless of how much activity you have on the account. So this will help you build your mileage balance, but won’t help you reset the expiration date of those miles.
Miles & More miles are most valuable since they can be redeemed more than 15 days in advance for travel in Lufthansa first class. So if you want to lock in a Lufthansa first class award ticket with advance planning, Miles & More is the way to go, since partner loyalty programs only get access to that space at most 15 days out.
So I wouldn’t sign up for a Miles & More account just to take advantage of this offer, but if you have an existing mileage balance already, you might as well earn some bonus miles.
(Tip of the hat to @IadisGr8)