Add Payment Method: Buy XMR with Amazon Physical Card
After consultations concerning of the vulnerabilities of email and in conjunction with issue #1239; I update with the use of a SimpleX address visible to the taker and arbitraters.

Method: Buy XMR with Amazon Physical Card (Purchased with Cash)
Reason: Popular on localmonero and anonymous version of eCard.
Vulnerabilities: Same as eCard where a dispute is over card already redeemed.
Account creation fields: As Amazon eCard except the addition of a SimpleX(SX) address field which is mandatory.
Settlement period: 1 day.

Offer stages:
1. Purchase Amazon Physical Card with cash, retaining both the purchase verification receipt and a cash receipt. Store details may be redacted but not purchase date and time. Purchase verification and cash receipts scanned along with the physical card after revealing the redemption code. Remove metadata from scan(s).
2. Create offer with SimpleX(SX) address details and confirmation that card purchased with cash in notes field.

Taker stages:
3. Account created with SX address details and SimpleX prepared.
4. Takes offer. (optional[not recommended]; chat used to indicate acceptance of the redemption code being sent by Haveno trade chat. This is useful where the xmr buyer has 'reputation'. see Notes below)

Trade stages:
5. XMR Buyer confirms trade.
6. XMR Buyer SX the scans of the verification receipt, the cash purchase receipt and the physical card with redemption code revealed.
7. XMR Seller redeems the Amazon code.
8. XMR Seller confirms payment for xmr.

Arbitration risks
The same as eCard trades, but reduced by using SX to send scans.

Notes:
XMR Seller can opt for the redemption code being sent via Haveno trade chat, which can be useful where both sides have traded previously. 