NOTE: Kraken requires "whitelisting" of wallets in their setup, which makes them unusable for these BUY strategies:
1 - coins cannot be sent directly to the customer!
3 - the fallback option is strategy #1 - which, as noted, won't work.
5 - coins cannot be sent directly to the customer!
Strategies 2 and 4 require you to send coin to the Hot Wallet - which CAN be whitelisted. You must add it as a permitted withdraw key (read below).