The others try trading too, you know, earning many altcoins as they want and then trade it all to bitcoin when the price dumps, there are also a lot of way other than doing freelancing and joining a signature campaign, there is this PTC( Paid To Click), where you are being paid to watch or view an advertisement, theres Captcha solving, though the earnings here are not that good, but if you started in the past, I know you have now earned a lot.
I'm working paid to click too and captcha solving but yea your right the earnings are not good but it can help for trading if you want to. Many altcoins there are waiting to pump so trade your bitcoins for extra earning.