Yes exactly I’ve never heard the random thing either other then from players themselves. In fact they specifically say expect a constant stream of new planets
“ * Special Worlds: Exoworlds will shortly start visiting the Boundless universe. These are worlds that enter the universe temporarily, orbiting around another world, before vanishing never to be seen again. Expect a constant stream of new worlds to explore, filled with resources to harvest, unique colours to snag, and a playground for future features. There’ll be no regen or beacons on these worlds so once they’re exhausted you’ll be ready for another. Exoworlds will also include the first Level 7+ Rift, Darkmatter and Blink worlds. A new challenge awaits, but only until you or they expire…”