While I loved the article and will check these sites out as I find jobs that pay in cryptocurrency to be interesting and great for market adoption, I do not think that there are no risks.
As there is no difference to working for fiat and then turning that into cryptocurrency. Your time and efforts are the risk you could devote yourself to something else, make more money of any kind and then turn the uneeded amounts into cryptocurrencies.
Just as trying to be blogger on steemit has risks, the risk that you will put in effort and never attract a following.
That being said very interesting information.