Question about SfB Licenses

[Renke]

Hello Evan,

thank you very much for the fast response !
What I did not understand and did not find any information about:
On the license portal I can get 90 day licenses and unlimited licenses for SfB.

When do I get a 90 day SfB license and when do I get an unlimited one ?
It would be nice if you cann tell me about the difference between these or provide me a link, where I find explanation about it.

Best Regards

Renke