In the development of our current civil aviation environment, it has been found that the following process results in MORE safety.
If a certain technology is new:
- DO NOT allow widespread operation until such time that RISKS are well UNDERSTOOD and MITIGATED.
- Do a comprehensive (which means veeeery lengthy and expensive) test regime
- Account for risks (in terms of safety, security, etc...)
- Find ways to mitigate risk
- Create the relevant regulations
- Allow operation within the regulations
This means: NO commercial operations before this process is complete.
All aircraft manufacturers put their new designs (and in most cases , modifications of designs) through a demanding test regime.
Not doing so has been proven to be very very (very !!!!) bad !
Reading accident reports from the 1950 will show exactly why this is needed.
In this case, it is not only the design, but the mode of operation, which is significantly different from the remainder of aircraft (routes, density , etc..).
Any responsible regulator will be very careful with this.
With regards on commercial delivery operations on territories not under FAA regulations, I believe most advanced countries have the same kind of restrictions.
Most of the Civil Aviation authorities of advanced countries, will have regulation regarding experimental aircraft, and these will exclude commercial operations.
All this said, I believe most major Civil Aviation Authorities are looking into comercial drone operations.