Dotcom-Monitor offers per-hour billing for using Load Injector Servers (LIs):

Load Injector Hours  = LI1 Time + LI2 Time + … + LIn Time + Reference Server Time (in hours)

LI Time is a server operational time calculated from the start of the test on a server until the end of the test.

For on-demand tests, the actual Load Injector Time will be rounded up to the hour due to the mechanism of LIs operation. For example, a 20-minute test run on 10 Load Injector Servers (including Reference Server), the Load Injector Hours = 10 × 1 hour = 10 hours. We charge $4 per Load Injector Hour. So you will be charged $40 for 10 Load Injector Hours.

In the case of SmallMedium, or Large plans, the actual Load Injector Time (test duration time) is used to calculate Load Injector Hours. For example, a 20-minute test running on 10 Load Injector Servers (including Reference Server), the Load Injector Hours = 10 × 20 minutes = 200 minutes or about 3.3 hours. In this case, 3.3 Load Injector Hours will be written off from your resource wallet.