It is our most advanced license model. This says it all.
With Unlimited Perpetual Distribution you get the freedom to use Flexmonster for your application without any limits. You can issue the licenses to your clients yourself, without referring to Flexmonster Team. The only restriction is that you can provide Flexmonster licenses to the clients within your product only, and not to third parties.
Unlimited Perpetual Distribution is available in Premium edition, which includes additional premium support services. You can find information on the difference between Standard and Premium support here.