Ok so here's the thing that got me started. I wanted a Muse invite code, found like six posts, tried four codes, and every one was full. By the time I found a working one I'd almost burned my 48 hour window.

So I started keeping a little list for myself and checking it weekly. A few things I learned along the way:

Muse (1 billion tokens each)

The 48 hours starts when you make the account, not when you find a code. Have the code ready first.

Web: Settings > General > Usage > Redeem invite code. App: Settings > Redeem token.

Codes have a use cap, so a code pasted in a comment thread is usually dead within hours.

Claude (free week of Pro)

It's a guest pass link from an existing Pro user, not a code you type.…