I would say so, I play without investing money. Very lucky at the start, got Pandemonium, the basis of my deck. Plus, event gave a bunch of mythical cards under Ascend. Weaker than new, but the cards are strong. So stay after the upgrade t0 60 seats on average.
With the storyline got Stormbringer, and a few decent cards, plus myths and a few epics with Regular Booster. But they are for my deck does not fit, are in stock.
Ideally, in Ranked is to play after Fully pass the first two maps of the storyline. Ie 7 stars.