If I have to skip my next turn because of coronatog or something and then get roped into another game by better than one, can I skip my turn in that game instead?

No.

Hi Mark, yesterday we drafted a stashed box of Unstable. It involved "As Luck Would Have It" as high as 61 counters; a Five-Fingers Discount on Rules Lawyer to turn a game around and win at a negative life total; round 1 getting overtime because one player had to play two games at once due to Better Than One; and a player without a board state topdecking Over My Dead Bodies for a massive attack that left the opponent just one life short of lethal, fitting for a horror villain's last lunge.All in all a good time for everyone, and for what it's worth it confirmed that I liked Unstable more than Unfinity. Contraptions play better than stickers, and the "silly themes" feel more scattered in Unfinity, which makes the draft a bit more daunting as it's harder to get a feel for whether your deck will "get there" in terms of playability. The puns and flavour and individual cards are still solid, though! I just enjoy Unstable more.

I think Attractions are the closer thing to compare Contraptions to. Which you prefer depends on how much you enjoy planning ahead. Contraptions are Spike-ier and Attractions are Timmy/Tammy-ier.I’m glad you enjoy Unstable. I spent a lot of time on that too, and am always happy to hear people enjoying it. Stickers ended up being more polarizing than I expected. Part of it was logistical issues that we didn’t have a lot of control over.

White can’t get card draw, but can it get some form of card advantage that isn’t technically “draw”, like red’s “impulsive draw”? Maybe if it’s connected to creatures in some way?

White gets board sweepers and other removal that’s better than one-for one.

If someone copied Better than One 7.5 billion times, targeting everyone on earth, wouldn't that mean that everyone has played a game of magic?

You can’t do “outside assistance” on someone be who doesn’t agree to be involved.

I was going through the original Great Designer Search when I realized something. Alexis Janson submitted a card called "Getting a Head" for the silver bordered design challenge. This is where Better Than One came from right?

Correct.

Had lots of fun with unstable Mark, good job. Now, better than one, is there any limit to the size of a team you can have? Also if you already have a teammate does your new teammate become the teammate of your old teammate as well?

You can have as many heads as you gave copies of the spell cast. Note that only the head casting the new Better Than One splits their stuff with the newest head.

Does your teammate for better than one have to be out of any game of magic or is it specifically your game?

They can be in another game if that game is willing to pause while they play in your game.

Casting Better than One, can I share my contraption deck and contraptions? If so would they be considered assembled?

You can share both cards from your Contraption deck and assembled Contraptions which are considered assembled. You can’t change what sprocket they are in though.

Can I use More or Less to change a card's name? Say, "Gimme Five" to "Gimme Four", or "Better than One" to "Better than Two"? "The Countdown Is At Two"? "Four-Headed Goblin"? I have no idea why anyone would want to do this, since it doesn't change the rules text in any way, but I'm sure I'll find a crazy exploit somehow.

You can and it does matter; there are numerous silver-bordered cards that care about qualities of the name.

I cast Better Than One, then activate Kindslaver. Can my teammate advise the controlling person? In a multiplayer game, can my other opponents advise that person?

No. No one playing in the game may advise.