As best I can tell from reading posts a licensed theme can only be used on one site. However is there a means or discount of using it on a second site at lower price?
No, unfortunately not
1 purchase = 1 license = 1 website use
There are no multi-use license or discounts
Well. At least you’re honest. I’ll be making my next purchase through another vendor.
You can talk to the author of the theme. As the prices of themes are author dependent ( meaning, the author can set the price he sees fit) you can speak to him privately about getting a discount. Contact them via their profile. Cheers!
In addition to what @Enabled mentioned, there is also another option you could use for using the same theme on multiple websites:
With Envato Elements, you can pay a monthly fee, download unlimited content (including WordPress themes) which you can use on unlimited websites (you only have to register for free each website you are using the content on)
You can find out more here: https://elements.envato.com/license-terms
I hope it helps,
All the best!