"I wonder if that means there won't be any net profits for a decade?"

It all depends on how the "revenues" and "expenses" are defined in the original agreement and that can have a huge impact on when the operation will be deemed "profitable" pursuant to the agreement; for example, the depreciation rates and the resulting depreciation expenses on the capital investments of some $4 B would have a big impact; and what other costs such as depletion and future remediation costs are allowed and how they are to be calculated would also impact the "net profits", especially for the early years.

In other words, the operation can be profitable from an accounting standpoint yet may not be "profitable" based on the "net profit interest" agreement. To better understand that, we need the definitions from the agreement. JMO GLTA!