According to the development timeline, they'll be listing on an exchange such as Bittrex in Q2 of 2018. Which means mining now is considered very very early stages. You should see some interesting returns as they launch I believe. Currently the coin is tied with the USD meaning 1 JSECoin is worth 1USD.

That would change on listing and we'll see its real worth then.

Platform itself is great as an alternative to Adsense earnings.