I believe the most of member here hasnt skill of developing or creating if they had why would they do signatures to get some bucks when they can make thousands;Most member here has no special skills they do signatures,and invest at bitcoin or altcoin market hoping to get a good reward.
No offense, but it sounds like you are referring yourself. It is because you are wearing a paid signature as well. I'm good at multitasking, and I have a lot of free time when I'm at work and home. That is why I am online in Bitcointalk most of the time.
0.5 btc is not a big deal I guess, If you have a multi skills then you can make it easily in one month's time, it depends on an individual and the skills that he holds.