Bit of a misleading title, considering the majority of the article deals with Brisbane's 50 cent (i.e., very cheap, but not free) fares, and other examples include "free only on Friday" (i.e., the day work from home is most popular) and "free only for children". Still, the system rolled out in Queensland is an extremely welcome one. Everyone benefits from it. No complications around "do you qualify, do you have proof of qualification" or needing to plan your trips around limited locations or times the cheap fare applies. Just a blanket, easily-affordable option.
Some context that people might find interesting. The trial was begun about 2 months before an election, in a desperate attempt to win back votes from the centrist party who was flailing in the polls with a right-wing party about to win. It didn't work, but the trial was so successful and popular, the right-wing party had no choice but to keep it. A delicious turnaround from the last time the right-wing party was in power in Queensland (2013–2016), when they rolled out a system that required you to carry three different cards with you to get the student discount on the extremely expensive public transport. Your Go Card as proof of payment. Your student ID to prove you were a student. And your "Tertiary Transport Concession Card" or TTCC to...further prove that you're a student, I guess? Universities were forced to create systems to verify students when applying for a TTCC. To this day I genuinely have no idea what purpose the TTCC was supposed to fulfil other than to increase the rate at which they could fine students.