This is the question that started the project. Actually, poor African farmers do it at a small scale, with a high labor associated cost. They do not have the technology that we can build.
Some objections:
– termites are hard to grow (many fans and some companies and research institutions do it regularly).
– termites can escape and be dangerous (not with good containment and safety practices)
– termites can give bad taste to chicken meat (unlikely – unfounded)
– termites are disgusting and the public will reject them (this concept will soon disappear after the fears prove unfounded)
– termites grow slowly (also does grain)
– termites will be an expensive way to feed chicken (previous experiments prove it is cheaper, and much cheaper at industrial scale; termites require very little care or supplies).
– nobody does it because nobody did it (so, I/we would be the first)