“Dark Sender” positions itself as a promotion service. Although its functionality and work format suggest that its ceiling is bot management. Here, it outperforms its analogs mainly because it's cheaper. And without a subscription, you pay only once, and it's inexpensive. One downside is that it's tied to a computer. But they promise a couple of reassignments for free if needed. How this will work in reality, I don't know, as I haven't checked yet. I have never used it for honest promotion; I just run bots and spam from throwaway accounts. I don't mind losing them since they get banned constantly. If you don't use proxies, that's what awaits everyone, keep that in mind. There’s no additional protection or smart limits here. However, it's not the case that every newly added account gets banned immediately.