Break eggs, hatch pets, bring them to your base for cash, feed and level them, rebirth for a bigger base, and use hatching, mutation or fusion to pursue rare pets.
The official description ties pets at the base to cash but does not publish per-pet rates, collection intervals or capacity rules.
Yes at a high level: both are tied to producing more money, while exact costs and scaling remain unknown.
The confirmed result is a bigger base. Requirements, resets and multipliers are not documented on the checked public pages.
No. This is an independent fan-made guide, and no developer-owned public wiki was found during the latest check.