As per the treaty signed in 1842 the British were allowed to use the forests and their natural products against which they had to pay around 3,000 silver coins to the five kings. Currently the kings receive a monthly political pension by the Government of India, which is the main source of their income. This payment is continued even though all privy purses for the Princely states of India were stopped in 1970 since the agreement was between then monarchy of Dangs and the British
Sub-National Monarchies are really common outside the Western world, especially in Africa. Many pre-colonial Kingdoms still exist, have borders and monarchs and subjects, they just aren’t sovereign nations. The Sokoto Caliphate is a big example.