Yes, you can definetely migrate from other systems. I have attached an example of migration script from J2T Reward Points extension to Plumrocket Rewards.
You can use it as an example to migrate data from your current reward points.
Please follow these step-by-step instructions:
1. Download the attached archive "reward_points_migration.zip".
2. Extract the downloaded archive.
3. Upload "reward_points_migration" folder to your Magento root directory.
4. This script can be executed in 2 ways:
- Using command line, please run:
php /absolute/path/to/magento/reward_points_migration/start.php command
- Using web browser, please copy, paste and follow this link:http://www.yoursite.com/absolute/path/t ... /start.php
5. If the script has stopped unexpectedly - please repeat step 4.
6. After the migration is finished, you should deactivate the previous extension by simply renaming the file
7. Flush your Magento Cache as outlined below: http://wiki.plumrocket.com/wiki/Frequen ... ento_Cache