It looks like the same stuff as Wetfire tinder and Weber lighter cubes.
Wetfire is the most expensive.
Weber lighter cubes are MUCH cheaper than both Wetfire and Sure2Burn but is packed in a single tray of 24 which is not that convenient to carry since once they are exposed to air, the stuff deteriorates. I have tried coating it in wax to preserve its function but have figured out no good way to prevent the wax coated cube from shattering when carrying it around.
Each Sure2Burn is about half to a third the size of the Weber cubes but has the convenience of being individually packed. Even if the stuff shatters inside the package it is still no big deal.
I can use a Weber cube to make a cup of tea in a canteen cup but Sure2Burn is useful only as tinder.
My perfect solid fuel tab would be sold as individual tablets that is large enough to boil one water for one canteen cup and is doesn't soot up my cup. I have yet to find it.
Conway Yee