Most specifically, the UDENTE model offers a firmer control
over quality and sustainability (membership supported) but has
disadvantages in the cost of creation/maintenance of resources and
the costs of access. The Net-University model has a wider quality
threshold and is co-dependent for sustainability upon mass user
engagement in the creation, maintenance and quality control of
resources, but it has the advantage that resources are easily available
and inexpensive to create and sustain.