The documented income engine
Every pet earns Cash per second. The official description's offline-earnings promise means that income continues while you are away, so the size and quality of your roster - not active play time - is the true earning variable.
Quality multipliers stack on that base rate: Golden pets earn 1.5x, Cosmic 2x, Inferno 3x, Admin 4x per the Sportskeeda mutation table. Moving a 3x mutation onto your best earner raises total income by more than adding one average pet.
The pet Index adds permanent Cash and Luck boosts as the collection grows, which quietly raises every future session's baseline.
The daily farming routine
Session start: collect, check the shop for codes (the documented rewards are +2 to +4 Luck boosts), and claim any active one before rolling. Luck windows last 5-10 minutes, so plan rolls inside the window rather than spreading them across the session.
Mid-session: spend earnings on the binding constraint. If income feels slow, buy pets; if raids keep reaching pets, buy walls and defense blocks; if a rebirth tier is one species away, hunt that specific requirement instead of generic rolls.
Session end: leave with a full base and every pet placed. Offline earnings scale with the roster, so an emptied base before log-off is donated income.
Rebirth as a farming multiplier
Each rebirth pays a permanent Luck multiplier (2x at tier 1 up to 208x at tier 16), +2 pet slots, +3 defense blocks, and gear. Slot growth means more simultaneous earners; Luck growth means each roll session lands better species.
The Cash requirements scale steeply - 50,000 at tier 1, 1,000,000,000 at tier 12, 10 quadrillion at tier 16 - so mid-ladder players should treat rebirth as the session goal that all surplus Cash routes toward.
Hold requirement pairs (Owl + Llama at tier 3, Sphinx + Pegasus at tier 9, and so on) instead of selling duplicates; a missing requirement species blocks the tier no matter how large the Cash pile is.
Event farming
Events run on a biweekly Saturday rhythm per the game-profile wiki, and each type pays differently. Cosmic Invasion abducts base pets and returns them with the 2x Cosmic mutation; Volcano has a small chance to mutate in-place pets at 3x Inferno; Admin Abuse windows after updates produce the 4x Admin mutation.
Mutation farming is income farming: a mutated pet sells for more, so event windows are also liquidation windows for duplicates. Sell mutated duplicates promptly and reinvest in roster or defense.
Follow the official Discord for Admin Abuse timing - those windows follow updates rather than a fixed clock, and the 4x multiplier is the largest documented in the game.