I thought I'd sign up to the JSE platform and give it a go a few days ago. 1 JSE is currently pegged to US$1.00, so it's going to be interesting to see just how viable mining JSE is as time goes on.
Signing up to the site was easy. It did ask for name and address though, which may put some people off, but having a PO Box, that wasn't a deal breaker for me.
You can see the mining in action at my Steemit verification page at http://thorhammaraxx.com/steemit-info
Results After 3 Days
Browser Mining & Website Visitors
I don't get a great stack of hits on the sites that I set up the mining script but they have returned almost 1JSE so far.
Browser mining has returned just over 3JSE in three days of mining