How about an economical model?
Three options for a player to choose. Permanent placement to a country. Permanent barring to a country. Monthly rotation through the three countries on the first of each month when logging in for the first time of the month.
Option #1 Permanent placement to a country = $9.95/mo subscription fee
Option #2 Permanent barring to a country = $4.95/mo subscription fee
Option #3 Monthly rotation through the three countries on the first of each month when logging in for the first time of the month = FREE subscription
Option #4 Change countries at will = $44.85/mo