Gonna start out with one of the most common rewarding ways in social games - e-mail refferals. I don't know how hard it's gonna be to implement it, but sharing the game with friends and acquintances might improve the player base and the community as a whole... Atleast in my opinion.
As we are looking for a substitute of codes (which I like, because everyone can access them), maybe you could make another claim system or just double the current rewards for claiming daily login rewards or chests.
More ideas to come in form, as soon as I can translate them to english in my head
If multiple posts aren't an issue ofcourse...
*ЕDITED* e-mail refferals, rather than just refferals.
As we are looking for a substitute of codes (which I like, because everyone can access them), maybe you could make another claim system or just double the current rewards for claiming daily login rewards or chests.
More ideas to come in form, as soon as I can translate them to english in my head
If multiple posts aren't an issue ofcourse...*ЕDITED* e-mail refferals, rather than just refferals.