You get five slots. You spend them on the five best people you know. Whoever gets the first yes keeps that person in their tree, and everyone they add after that is above you.
Who can reach you is a short, named list you see before you say yes. It can only shrink.
Each slot is an email address and a one-line reason. If someone else gets their yes first, they are gone from your reach for good. Choose well.
Only the line of people below you can send you an Ask, at most 5 a week, each sender limited to 3 a month. Silence costs you nothing. One click cuts anyone forever.
No directory, no search outside your own tree, no forwarding. Every message names the people who vouched for the sender.