I used 2012 account and 30$ as ads budget but account got suspendedSlow budget, preferably aged accounts
Have you seen cases where horizontal scaling works initially but long-term CPM rises due to saturation?Horizontal scaling is more stable.
When you sharply increase the budget of a single campaign, the algorithm sometimes goes into relearn mode, and performance can degrade. If I were you, I would copy the winning ad set/creative and duplicate it horizontally. I would also increase the budget in small increments. There is less fluctuation.