How can I obtain rubies in Mario Kart Tour?

In Mario Kart Tour, players can obtain rubies through various methods. One common way is by progressing through the game's Tour Seasons and completing specific challenges, which often reward rubies upon completion. Players may also be awarded rubies when they level up or improve their player rank by achieving high scores in races. Furthermore, purchasing them as in-app purchases is an instant method to get rubies, with different bundle options available in the game's shop. Lastly, there might be special events or promotions that provide rubies as a bonus or reward; keeping an eye on ongoing events and updates can lead to opportunities for acquiring additional rubies.