One shared tower. Drop your link on a block and land as high as your money takes you. The biggest payment holds the golden top, until someone outbids it.
I used to play Tower Bloxx on my Nokia - stacking blocks, trying to keep the tower from wobbling. That's genuinely where this came from.
TowerBid is one shared pixel tower. You drop your link on a block and pay whatever you want. Your amount decides how high you sit: the biggest payment holds the golden block at the top, and anyone can pay more to land above you. Ties go to whoever bought first, so being early is worth something.
You only type a URL. The name, favicon and one-line description get pulled from the site itself, and each block shows how many visits it has actually sent you.
Two honest notes: it's a weekend build, and it's a novelty rather than a serious growth channel. Your block is permanent, but the top spot is not - that's the whole point.