Your article doesn't mention how much you paid them. If you are paying someone 5$ per hour, you can't expect much.
edit: you mention the prices in the comments, so here they are for anyone curious:
Node.js port 155 USD, Android port 789 USD, Website theme 300 USD. It is not slave wages considering the living costs in the respective countries.(sic!)
edit: you mention the prices in the comments, so here they are for anyone curious:
Node.js port 155 USD, Android port 789 USD, Website theme 300 USD. It is not slave wages considering the living costs in the respective countries.(sic!)
>Node.js port 155 USD
This is good for what, 1 hour of work?
Pay peanuts, get monkeys.