Bitcoin is like a shitty coin which is causing me to waste my precious time 
In that case why are you using a signature that no doubt pays you a small fraction of a bitcoin for each post? If that small fraction of a bitcoin becomes very valuable tears from now then it's not a waste of time.
Every coin has two sides and that's true joining a signature campaign doesnt pay you huge amount of bitcoin and for that you need great level of dedication and discipline to invest your time in commenting on the posts but its a safe way to earn money you are investing your time and you are earning valuable bitcoin out of it.
That is not true. Actually it depends on what are you compared it with. For now signature campaign gives the best payment if you compared it to some
faucets, not saying that about doing some bot with faucets or may be you got tons of refs there. And the best about signature campaign besides its
payment, it is no risk gain so you sure will get your bitcoin just in matter of time