Firstly I would add more regions to this topic, but I researched a little and found this topic!
After a quick research through the forum, I found it quite surprising that no one has made this feature request yet gets closed and unlisted. Quite oftenly I feel there are just too few free aircraft, especially in the airliner segment (There’s just the A321, A380, 717, 737-700, 747-400 (Yay!) and the CRJ-200 in the airliner segment). Perhaps from time to time (like at every 5 updates idk), make 1 or 2 pro aircraft free. Or maybe, add some sort of coin system that earns you coins by watching ads after each flight (that is disabled once you get pro) (I mean, we just have the regions anyway…). This coin system could also be interesting to buy regions too (I personally want to fly at the region of my house, at around SBSP and SBGR, however most regions are at the US for some reason). The coin by ad syistem could also be interesting to the devs too, because ads bring them some revenue, don’t they?!