Two place cockpit is a must for most potential foreign sales and IMO a plus. Not sure if they offer or have even designed a single seat variant, doubt it. Other branches of the military and most foreign buyers want a second crew position, give the customer what they want.
On the single or dual seat argument with COIN aircraft, historically and currently, COIN aircraft had and have two seats as the workload from operational experience has demanded it. It has been mentioned in these forums before and I will steal the thunder from another member that we sometimes confuse manned ISR with CAS, I'll extend that idea that this mission I call LASO (Light Attack Surveillance Observation) is not CAS, where fires are delivered more readily than in the LASO mission. In the LASO mission because the fires are harder to deliver effectively, it lends itself to a multi crew platform.
The fires or effects are not likely to be delivered against a readily found/unambiguous target; they require time, effort and coordination to action them. Two or more crew members managing sensor(s), multiple frequencies/playmates and potentially a long loiter over a target area with likely changing GFC priorities can do this efficiently and reliably, so can a single seat platform but usually only as a two-ship, so really it is not a one man job.
The US has previously operated COIN aircraft and they usually had two seats, the OV-10 & OV-1, both true COIN aircraft (low cost, technically simple, light kinetic capable, observation focused, etc..). Almost all the other coin aircraft actually flown or dreamed up had two seats for the reason that fires in COIN / Irregular Warfare are not necessarily easily delivered and the operations tend to need two craniums, divvying up the chaos, developing SA and then delivering whatever air to mud effects are needed.