The best way I try to explain to people about the Part 107 & hobbist are like my Driver License status. I have a commercial status (Class B) with several endorsements, Tank, Airbrakes, and few others. When I drive my personal vehicle, none of that applies, but if I get behind the wheel of a commercial vehicle all of my endorsement must match or exceed the type of vehicle that I will be driving. Part 107 kinda works in the same way, the key factor is that if you are flying for payment or furtherance of a business (including your own) you need to have Part 107 status. The one gray area still out there is Youtube and other social media platforms, some will say that its in furtherance of your business (if you receive payments from Youtube or even gain customers) advertisement. At some point, some smart lawyer will challenge this and we will see what the fallout will be as far as online content.