While they haven't yet decided on a minimum weight limit for this requirement, one thing the agency wants to make clear is that registering your drone ideally won't be a difficult process, and you shouldn't pay anyone to do it for you.

Here's some of what they said in a recent article on the topic:

Owners should wait until additional details about the forthcoming drone registration system are announced later this month before paying anyone to do the work for them.  

The Task Force assigned to provide FAA Administrator Michael Huerta with recommendations on the registration process is still days away from delivering this information. But at least one company is already offering to help people register their drones for a fee.

They went on to say that the registry process will ideally be as simple as it is when you're registering a product with a manufacturer (which if you've ever done it, is sometimes more hassle than it's worth). The bottom line is that paying a company to do this for you is unnecessary, especially as the rules have not been finalized yet. 

Either way, it remains to be seen whether this move by the FAA will have the intended consequence of making drone operators more accountable for their machines and where they fly them. If you missed the registry announcement, here is that video once more:

Source: FAA