On June 10, the ROI was 1.22.
On June 9, the ROI was 1.12.
On June 8, the ROI was 1.18.
On June 7, the ROI was 1.5.
Starting on the 7th, the ROI began to drop. The reason for the decline was my attempt to scale up spend; I increased the budget, and as a result, the ROI fell to around 1.