Ok here is a silly idea.
What about actively coins.
Ok hear me out you have the ticket shop that sells every ticket level 1 threw 6 plus the engine and special parts tickets, and the shop is open 24/7 for you to buy the tickets as long as you have the coins to do so.
Actively coins? You ask well you'll get awarded actively coins from doing normal stuff like 3 to 5 sport races, taking 5 to 10 pictures of your cars, making and sharing a livery, and doing world circuits races, and so on.
Now how much each ticket is worth I'm now gonna say since you guys will just laugh at me.
Of course the livery sharing and photo taking coins will have there limits as to not be abuse.
Ok I'll leave now.