Why pay for a filter?

In the current filter there are a few filters that are completely free, the most prominent example is K9. Other filters on the other hand have a modest or not-so-modest monthly fee.
What a Chutzpa!
Well, actually paid filters and free filters have substantial differences, so it's like comparing apples to oranges. Here are the key reasons why paid filters cost $$$ (Hint: it's not because they want to rip you off).

• Licensing costs: Paid filters generally do not use their own filtering technology, it is too difficult. Instead they license filtering technology from other companies, and then customize it for their customers. For example, Jnet, Meshimer, VCF (Venishmartem Cloud Filter) and NetTzach all license the same technology from Livigent. VCF Basic licenses technology from  Websense. 
• Support: Paid filters give much better support than free filters. (Note: Meshimer gives very extensive support, and that's why their price is higher than VCF.)
• Filter management: Rather than allowing you to open anything instantly during a weak moment, paid filters manage the filter for you and open/close sites that you request. This service adds to the cost as well.

Note: If you can't afford to pay for a "paid filter", but really want the benefits of it, you can fill out this form and request to receive a free license for VCF.