Ann: Los Angeles Police SWAT Sign Trial, page-2

"XRG will not charge LAPD SWAT to use the Operator XR technology during the 3 month trial period,
but are confident that the success of the trial will lead to revenue earning opportunities from this and
other follow up arrangements with other US State and Federal law enforcement agencies."

In my work field, we make potential customers pay for long trials like this as they are usually very expensive and it also forces the potential buyer to have a more serious commitment to the trial hence increasing the changes of a successfull deployment.