Is the Bootloader really unlocked???

So I just bought the 710 a couple days ago. Its really nice.. not perfect (no quick charge, no usb type c, no front facing speakers) but so many good things... its a basically an ipad mini running android, the ridiculous nice 4:3 screen with navigation on narrow side, really lightweight, 32gb w/ microsd, fingerprint, touchwiz keyboard and most importantly we have twrp already!?! Im really feelin' this over the nexus 9.

Can someone explain to me how this is? Do these devices come with unlocked bootloaders or is this some type of bypass or unlock we have achieved? Just really happy to have such a sweet device with custom rom potential.