The other day, I took a device I received with ECO stock and set it up separately on my account, which took some time. Of course, I immediately used the 4000 preVape I received and lost it all, haha.. Additionally, I continued to use 40,000 preVape for re-casting, but it only goes up to level 7 at most. The problem is that even if it comes out at level 7 now, the mining efficiency has dropped so much that even if I run it for 50 days, I would actually be at a loss. In other words, even if I use up one box of pods, with this device, I probably won't be able to make the approximately 20K needed to buy a new box, let alone the 44,000 preVape, so it feels like it might just end here. At times like this, I either need to put in more preVape until I get to level 11-12 or just stop here. However, the issue with levels 11-12 is that sometimes, if you're lucky (really just luck), you can get it with only 100K, but if you're unlucky, you might not get it even with 1 million preVape. So, with this device, I'm not aiming too high anymore, thinking that this luck has reached its limit, and I've left it as is for now. I'm currently mining on another main account with the goal of mining as much preVape as possible. Most of the devices are set to level 7, so I am actually at a loss in the current mining state, but overall, it still seems to be profitable enough to keep running. However, I know that if more devices come out, the mining efficiency will ultimately not improve without additional upgrades. In other words, there are still quite a few potential burn locations left for the future.. haha, making re-casting a burn location seems to be a stroke of genius, haha..