Actually unfertilized eggs are producing drones, and fertilization eggs are producing workers.
Drones are not capable of building in the hive, collecting nectar or even feeding them self, but ... In very hot summers they can help in "ventilation process" of the HIVE. They don't have a sting, but they make noise, and sometimes fight if the hive is attacked.
The drone bees are useful during the short period of mating but then they hang around doing nothing at all. While food is plentiful, the female workers tolerate their presences but, later in the season when food is in shorter supply, the males are forbidden entry to the nest and left outside.
This means certain death as drones do not have pollen gathering equipment or a sting, so they can't collect any food and they are completely defenceless against attack from potential predators.
Many people see those videos online taken with 2019 drones and immediately think these are pretty cool. Truth is… they are, indeed. However, the other side of the picture is what almost nobody thinks about.
I guess the best way I can explain this is as follows: Would you like to have a Ferrari? Most people would say a sounding yes to this question. However, that is because they think about driving it, or how they will look in a Ferrari. Most people don’t know that a Ferrari requires a very different type of maintenance than most normal cars.
The fuel, I personally don’t own a Ferrari, but if I had one, I’d think about the type of fuel, oil, and other lubricants it needs. Perhaps it is the same your car uses, but we have to consider that we are talking about a car that feels comfortable at 155 mph.
And… the same happens with drones. Most people can tell how it feels to drive an RC car, and how that is translated into driving an actual car. But… not everyone is experienced when talking about aerial stuff.
Thus, I ask you: Why do you want to start with drones?
If you are thinking that since the beginning you’ll be able to take those great aerial shots and control the drone like a pro, I want to warn you. Drones are not easy to control, especially the cheap ones.
On the other hand, you can get a high ticket device, which is easier to control, but you’ll risk your investment because of the lack of skills to pilot and control it correctly.