We purchased SkillTrek from a large homeschool family like ours. The original Wordpress platform was setup in such a way that it was easiest to license our material on a per-family basis. However, I stupidly never stopped to think about how "a great deal for an entire family" sent an unwelcoming message to families who just had a single student in need of our materials.
Only in the last few weeks have emails started asking about single-student pricing.
Yesterday I added a "per student" price option, and I'm excited to see how well its received. Sometimes that's "obvious" takes a really long time to come to light.