Looking back, I guess I did it because it was the "right thing to do", back in the late 1960's. My older siblings had both Regular Pioneered, so I did for a while, then dropped down to Aux, one month on, next month off, to earn money while "off".
Before long I started courting my wife to be ( she is still here ! nearly 52 Bloody years, and she won't take the numerous hints) and had to earn money to pay for our Wedding and gawd knows what, she was no good with money, at the time.
I only did one more stint of Aux. in the late 80's I guess, I really don't know why for sure, it wasn't to impress, or "the right thing to do" or anything, I had got beyond that by then. I must give my motive some thought, but suspect it may have stemmed from the Elders exhorting us to Pioneer, and not doing it themselves, so I picked on an Elder I knew hated D to D, and got him to sign up, to "help" me !