Ever since people have been getting the news of Brickadia Alpha 4 being out, I've been worried that Blockland's community would take a hefty dip in active players. We've been on a decline already and we're pretty much doing nothing to stop it too, and the only thing I can come up to fix that is to just host. I don't care what it is, but if you have an old project you abandoned, don't be afraid to pick it back up and resume work on it to see how people would enjoy it.
Not to mention something as simple as throwmod can boost your server to the top in a few hours.
I don't know what to put here currently, so I'll just summarize it here
TL;DR, if you want to bring Blockland back together, host. Be creative with what you host too, it can range from a gamemode or just a silly freebuild with an assortment of addons.