I do not know XTL, I'll take a look thanks.

In the past I did the same, mining Monero with JS (coinhive.js), but now it's way more difficult to mine and I think that it is not well seen by new users because some websites run it in background without telling their visitors.

The things that I liked the most are:

• There's a lottery system that deters big players from monopolizing it
• It's an eco-sustainable project
• Well made whitepaper
• Big Antivirus companies whitelisted it
• They're getting listed on exchanges
• Good referrals program & bounties (eg. post on Facebook: 1000+ friends -> 30 JSE)
• Good team _{( even though they could use more devs IMO )}
• Open source
• Bugs Bounty program
• Clear roadmap
• Super easy to start accepting payments in JSEcoin on your website or let your visitors mine it for you instead of using ads (PS. example)