No subscriber shall be refused service arbitrarily. However, for unusual circumstances, such as a subscriber’s request to locate the cable drop underground, existence of more than one hundred fifty (150) feet of distance from distribution cable to connection of service to subscribers or a density of less than nine (9) subscribers per 1,320 cable-bearing strand feet of trunk or distribution cable, cable service or other service may be made available on the basis of a capital contribution in aid of construction, including cost of material, labor and easements. For the purpose of determining the amount of capital contribution in aid of construction to be borne by the Grantee and subscribers in the area in which cable service may be expanded, the Grantee will contribute an amount equal to the construction and other costs per mile, multiplied by a fraction whose numerator equals the actual number of potential subscribers per 1,320 cable-bearing strand feet of its trunk or distribution cable and whose denominator equals nine (9) subscribers. Potential subscribers will bear the remainder of the construction and other costs on a pro rata basis. The Grantee may require that the payment of the capital contribution in aid of construction borne by such potential subscribers be paid in advance.