To the best of my knowledge, there is NO LIMIT on the shop multiplier. It also happens to be the only upgrade that's not crippled by diminishing returns, where you keep spending bigger chunks of your resources to receive less relative benefit.
The shop multiplier is the #1 factor that determines how far you'll get in tournaments (much more important than upgrading decorations).
There isn't much more to know about it. Every time you hit a new level, the multiplier rewards from everything increase by a factor of 5.
Will the tickets carry over to the next gains week or should I spend them all today?
Tickets will carry over. Don't worry![]()