This is a very strange way of earning that with zero balance you can earn handsome amount of Cryptocurrency.You can build your account in BTC talk forum and participate in different signature/Bounty campaign you can earn crypto by dint of your hard working.You can write constructive articles for web blog and can earn free crypto.If you are running a business accept crypt as a way of payment and earn free crypto.There are some online games through which you can also earn free cryptos.What are other ways by your stance please........
I don't understand too what is strange for you. Not everyone has free capital for investing in ico. Why not to earn by the fact that you can create decent content or do a qualitative translation of technical documentation.