Are you quite sure that the OP said you don't need an onward ticket.
The way I read it, the OP said he didn't need an onward ticket (flying with unamed airlines during non-specified periods)
Based on the many posts on this subject, the simple facts are that
1. any airline may not have required it yesterday, but may require it today;
2. some airlines may require it today, but other airlines may not require it at exactly the same time today;
3. any airline may require it for some passengers on a particular day at a particular time for a particular flight, but not for other passengers.
In oher words, one person's experience posted here is no guarantee that I will have the same experience.