Your doorbell already knows who is at the door. Your printer knows what came out. Supporter lets them attach it, so a glance at your lock screen is the whole story — and lifts the ceiling on disposable email addresses while it is at it.
Plain about where we are: Supporter is not open yet. The features above stay switched off for everyone and there is nothing to buy — the invoicing side is still being finished, and we would rather open the tier once than half of it twice. The price above is what it will be. When it opens, cancelling stays one click in the billing portal: the extras stop, and your messages, addresses and identities stay exactly as they were.