The wages they're paying are substantially higher than all the local averages. This is a good thing.
How is this "severely exploiting"?
The alternative is that the Kenyan economy remain isolated, small, and impoverished. This is a bad thing.
They're being specifically exploited because that is what the company set out to do. You could argue any number of benefits as a smokescreen but the reality is that they hired people in Kenya because they knew they could exploit them. Everything else is post-hoc rationalization.
Are the employees adults? Yes. Are they being forced to work there? No.
Are they choosing / trying to work there because the pay is higher than their alternatives? Yes.
Very different than child labor.