Ya huh but up til a few hours ago it wasn't and the bug was around since the beginning. Now say one company has a starting DOP of 600k while another has a starting DOP of 300k but can quickly increase that, even 2 hours is a huge difference, now say the bug is fixed and the people are compensated for their DOPxtime so far into the game(say 300,000x18 as a guess) they're compensated 5.4 million. But as the bugged airlines have to now wait 24 hours before they can increase this 300,000DOP due to plane processing time. Their total income is 12.6 million before increasing the DOP(minus expenses). Now 600k airline, as well as having planes on order which came 18 hours ahead of 300k airline, can instantly increase their DOP after 6 hours rather than 24(of course minus the time it takes to be able to afford said planes, 2 hours at max, so after 8 hours rather than 24 but it's negligible). Say it pushes it up to 1.5million DOP after the planes arrive. Now they have about an extra 24-27million rather than an extra 14.4million. Now 10 million is a huge amount. On top of this, even though they're making more money at the very start. Due to this downtime, players of the last round(there were 1300 I think) who have come back for this round late(as last time I checked there was 350 so we're a thousand off), give or take a couple hundred inactive players, see the login closed, and come back even later after login has reopened, or not come back at all. This then maintains the advantage that the 600k airline had rather than evening it out as those airlines fill up that airport and create competition, lowering prices and DOP's and generally making route creation and maintenance more time consuming. While the 300k's airport remains virtually untouched as it has that many less PAX at the airport, so that their DOP remains constant unlike 600k which would lower, and they don't have to spend as much time maintaining it which is probably the key feature that turns people away. This is basically rehashing what I said before with a tiny bit more detail and examples.
Edit: Sue me, I'm a ranter and don't really think about hitting enter.