There are few things here:
1. CND has general income from mining bigger than from hunting. You made exception by basicaly kicking the miners out from your dome. To me it seems you don't really want to make cash on the dome... just think how many places to kill trox do we have already on the planet - with tax and without, without travel fee. And with different maturities.
2. Since you turned on the spawn it's hard to mine the place, so you will get little income from miners in general in that dome. I used to mine dome 4, but I will not do it now, if I have to kill on my way from tp to tp. I don't like to mix hunting with mining... I have other domes to visit. And I'm not alone at this, trust me.
3. If you make PVP you will have many cases of PKing when killed person was killing a trox. People who die few times half way through the mob won't return to you dome, that's even less income for you.
4. You get no income from miners not hitting claim, that's true. But what's averaeg loot on one killed atrox? Mining CND like I do now my average claim is abundant I guess (yes, I'm amped there and abundant is a global), my average trox ~3-7ped. Easy to calculate what brings more taxes...
I voted NO.
If it's non PVP I MAY come there ones in a while to kill few creatures when I'm on CND. If it's PVP I will not come in because I don't like to be shot in my back and I'm not a killer who shoots others.
GL with the dome.