Review of Minecraft Server Directory
Review of ValveDirectoryList
Review of GainFreeStuff
This blog has some great tips, especially the articles on how to avoid disqualifications. My only complaint is that some of their "Top 10" lists seem a bit outdated. A few of the sites they recommend don't work as well as they used to. Still, a good starting point.
Review of CountCompare
I love the concept and the user interface is beautiful. It works great most of the time. However, on a few occasions, I've noticed it doesn't pull in all the available sizes for a product, so I have to double-check manually. Still useful, but could be more comprehensive.
Review of UptimeSpot
Review of EonSupply
Review of Anix Valve USA
Review of DiscordTree
We manage a 50k member server for a popular streamer. We use their top-tier premium slot and a custom advertising service where they helped us target specific communities. This combination has been our main source of new, quality members for months. It's a professional tool for serious communities.