Board Thread:Questions and Answers/@comment-26144532-20150225192205/@comment-24659969-20150226030926

Invite people to put your invitation code or simply buy it. Otherwise there are also events which give out cat food.

As for the stamps, unfortunately it won't reset. So once you gained tricycle cat, it is gone. It is changed into something else I think, so you still rewarded with daily login. BC actually considered pretty cheap already for free players. You can gain any cats excepts really few, any powerups, and have same progress with paying user, just slower.

For example:

You can have silver tickets from daily login which lasts forever.Then from the silver gacha, if you have maxed base upgrades you can trade every 5 those upgrade balls into rare gacha ticket which acts as subtitute from the catfood to play the gacha.

You can gain power ups by clearing SoL stages and obtain one randomly.