Microkote is part of a family of products that supply mainly calcium and copper , but other minerals calcium, copper, iron, magnesium, manganese and zinc : http://www.microkote.com/microkote/
The product is suspended in water based paint and supply the soil layers around the perimeter of the pot with a concentration of the minerals. If you look at the other examples you will see a root ball concentration in the center of the pot vs around the edges, the strong concentration of the chemicals on the surface of the pot and surrounding soil keeps the roots "focussed in vs out so its not a gift rather a different way to manage roots. the plants do grow stronger, mainly because of the recidpe of nutrients for the root system. The research showed that mainly the copper is the main cause of providing stronger roots and a "better" root ball, the other nutrient provided growth and stamina. I have used it on nursery stock to keep young stock in pot longer and healthier without root bounding, many fruit trees and vines such as mulberries and grapes can have very aggressive roots and this can help develop a more balanced root ball the first year. Many fruit tree nurseries need a little help developing better root systems in the first two years and this is where I have seen this product used. I would not consider this for long term use for figs in production years, but may try an experiment on a couple of my young rooted ones that have strong growth to see if the root ball is "better" or just redirected.