Since there are a lot of new people actively involved in the speculation (wondering when one of them will start saying there's an Eddie/Iron Maiden house coming) figured I'd throw out my uneducated summary of Legacy's clue guessing games...
His clues are VERY vague, intentionally so, so if you think you figured it out in 30sec you are definitely wrong.
Be prepared to have an idea, google it, read up on, google several things within that first guess, and get sent on a wild goose chase that eventually brings you to the answer if you do it correctly.
Him saying it's a cypher for additional clues to come doesn't mean you get a Captain Crunch Decoder Ring that lets you instantly understand what he's saying, it just means if you can figure out the mystery to his clue and understand his logic, you'll have an idea how to investigate future clues. He's not going to announce all 10 (?) houses if you/we figure out the cypher early on.
Want to understand how he thinks? Look at past event speculation threads (ignore last year as that was already all known) to see his images, Rick & Morty memes, etc to see how he operates.
He's talking about RUMORED houses. That means that sources in the know have told him they MIGHT be coming. Everything is subject to change and he isn't given an event Map 6 months in advance to make his clues, he's taken stuff he's heard and making a fun game out of it. Read up on his RUMOR vs SPECULATION definitions...that always trips people up.
He's been wrong about houses before, and will be again. He's not inside Universal with access to the info, just has access to sources that have different pieces of info available to them that he can piece together. When he feels confident enough that he has a good idea what they're talking about, he might start giving us clues.
If you just throw random guesses out like, "I think X, Y, and Z" and Y is actually correct, don't expect any credit or indication that you got it right. He wants to see how you investigated and deducted your guess. You have to deduce the answer/house, not throw crap at a wall and see if it sticks. (I'm guilty of throwing out those random guesses, just pointing out they won't get you any acknowledgement in terms of the clues game).
If you guess wrong, but were on the right track, Legacy might like your post.
If you guess correctly, and show your work like 5th grade math, you will almost definitely get a like.
This is meant to be fun and kill time until the event. Don't take anything personally.
I could be completely wrong about everything I said above, my interpretation of the "rules".