Tried the method about a week ago with splashing my own accounts a few days beforehand; with 1/12 getting banned. Sat them for a few days and then ran on Air orbs. Gp/ph is around 470k; using stams and glories. Accounts also need high HP for the demons.
The ban rates aren't too bad; however not as low as other methods because their constantly running through high traffic areas. They paid the bond + splashing supplies within around 8 hours. On the weekend 8/8 got banned within 18-24 hours; meaning between 5.4m-8.2m. - Supply costs.
On weekdays they were started 6AM UK Time and banned at around 4PM. Wouldn't reccomened on Weekdays.
If you are going to run them; aim for weekends and splashing the accounts before running straight into it in my opinion.