Presumably Efani accomplishes that additional protection by maintaining a human support staff they put more resources into training than the average carrier. That's expensive, especially when you consider that it's a relatively niche service (so small user base to amortize that cost over) and presumably only used by people that really care about sim swaps, likely because they are frequently targeted for sim swaps, and thus the training needs to really work. They also have no other lines of business like device sales/financing that could help cover those human operational costs.
That, plus the fact that it's a premium service that is mostly only useful to higher net worth / higher income people, makes it seem reasonable that it would be quite expensive relative to a regular provider.
That, plus the fact that it's a premium service that is mostly only useful to higher net worth / higher income people, makes it seem reasonable that it would be quite expensive relative to a regular provider.