Bluetooth SIG Membership required for app to support BTLE?

quick question : looking thru the internet at Bluetooth support and saw that I am required to apply for a Bluetooth SIG membership to actually be able to develop apps that uses bluetooth? I tried to enrol but since I'm an individual, it seems that I can't even get to being an adopter membership (even if it's free)

Does anyone know what's the requirement and if it's really needed from a legal perspective. (There must be a LOT of individual developers supporting bluetooth sensors in their apps, but I'm fairly sure they are are not Bluetooth SIG members)