New members who sign up for the Jump Start to Summer promotions for bonus miles with American Airlines or Air Canada Aeroplan earn 250 miles just for joining Best Western Rewards and enrolling in the promotion.
Free 250 miles.
Also earn 3,000 additional miles after 3 stays and 1,250 miles per additional stay during the promotion period. This is 5x miles for Best Western stays.
Promotion links:
Best Western American Airlines AAdvantage Jump Start to Summer Bonus Miles registration link
or
Best Western Air Canada Aeroplan Miles Jump Start to Summer Bonus Miles registration link
Here is my
Loyalty Traveler analysis on Best Western Jump Start to Summer promotion.