They should post here, or someone who knows about it, if it's public, can post.
No tricks. They should have been dating romantically for at least 3 months prior to the marriage, or have been married at least 3 months. Or some combination.
The relationship prior to Manifest must have been non-sexual, non-romantic, and online only, if anything. They must really both meet and spark it off together for the first time at Manifest 2023.
They don't have to be intense Manifold users or people necessarily - but they must meet first either physically at, or very closely associated with, Manifest 2023 (for example an after-party or a dinner afterwards). And they must both be Manifest 2023-associated somehow (i.e. maybe tagging along with a manifold friend). If someone ends up marrying their Uber driver to the event, it doesn't count.