If they did earn 0.01 its in prob buying and selling from something or gambling at some ponzi that achieves this.
I earn my 0.01 through fiat then buy bitcoin but I do it collectively when I earned enough fiat to go buy a solid bitcoin then buying small increments. I do fiverr gigs if thats a help, but even this dries up so getting a job would be the best choice.
I am surprised you are the only person that mentioned buying bitcoin. I moderate a chat where I see so many members wasting their day fauceting or spamming ref links to earn 62 cents in BTC or whatever.
It is best to invest a little fiat into buying some BTC, then invest that as you can to earn more.