Not heard about this but thank you for the analysis, I will have a look into them.
Personally I use Crowdholding. They are a crypto feedback platform where you log in for free, repsond and give feedback to tasks and earn crypto for it.
They have over 21k users, 30 startups and multiple tokens to earn. During tasks you earn both the startups token and also Crowdholding's YUP. They recently just got onto CoinMarketCap as well. I would recommend these guys to anyone who wants to earn crypto without mining, investing or sick of doing bounties and spamming social medias.