One of the topics our audience research is to figure out using linear interpolation versus
logarithmic interpolation for the font-size formula. So, we took the top 1 million
domains by traffic in the US from Quantcast
for a particular date, grouped the domains by the tld (top level domain) and then created
the following clouds one with linear interpolation and the other with logarithmic interpolation.
Notice how the 'com' tld which (obviously) has so much count is all you can see with a different
size when linear interpolation is used. This is when it may be beneficial to go with the
logarithmic interpolation.