Sign up for our daily newsletterEmail addressSign upI would like to subscribe to The Points Guy newsletters and special email promotions. The Points Guy will not share or sell your email. See privacy policy.You should always use an airline shopping portal when making online purchases. Bypassing the opportunity to earn miles for purchases you’d already be making is a cardinal sin in the points and miles hobby. And if you’ve been reluctant to jump on board (or, if you’ve just forgotten to do it), Alaska Airlines Mileage Plan Shopping is offering an enticing offer to earn bonus miles just for getting started.With Mileage Plan Shopping’s jumpstart promotion, you can earn 500 bonus miles for joining the program and spending $150 within the next week.While 500 miles isn’t the most, it’s nothing to turn your nose up at. Based on TPG’s most recent valuations, 500 Alaska miles are worth $9. Because Alaska’s Mileage Plan program offers so many lucrative partners and redemption options, those 500 miles could definitely come in handy.Keep in mind that the 500 miles to be earned as part of this promotion are in addition to the miles you’ll earn per dollar spent with individual retailers. The offer is only valid for new members who spend $150 in qualifying purchase(s) within one week of signing up. This promo will be valid between Monday, Oct. 1, and Monday, Oct. 22, 2018.