If I buy a GSi plugin, am I entitled to free updates?

Updates are free as long as the main version number remains unchanged (for example: 1.0, 1.1, 1.2, 1.2.1, etc.). When a complete new version comes out, the main version number is incremented or the name of the product will be changed, in that case existing users will be able to get the new version at a discounted price.