Never have figured out how Yuneec makes that separation. To fly professionally, ergo for hire, one must obtain commercial certification and register their aircraft commercially. So a professional IS a commercial operator as defined by federal standards and their aircraft, using federal registration requirements, are also commercial aircraft.
If a company had developed a drone to meet a military program of record standard but also desired to market that drone as a commercial product the company would have to develop the two versions independent of each other. The commercial drone could not benefit from R&D paid for through program of record to develop the military drone. However, the military version could benefit from R&D obtained from the commercial development. The differences between the 520 and H Plus are only software so both drones were created from the same pot. The same as was done with the 920 and 920 Plus where the 920 was classed as commercial while the 920 Plus isn’t classed at all.
At least for me Yuneec is implying their primary focus is on those willing to spend the most money when making a purchase, whether or not the product justifies or provides additional value. With the H Plus and 520 we have identical physical properties between the aircraft. Only software differs. Both are commercial platforms.