Why?
Like most things in life, the underlying motive was to increase the supply of pussy for me. I was thinking out of boredom and curiosity: "What (half/)hourly price band yields the most ladies.
For example, my usual band of £60-71 for 30mins, results in 37 hits, but £71-81 gets 56 hits, so clearly the market has moved or at least is a better price band to focus my energies on.
Similarly, I notice that Hungarians feature much more in my usual price band, whereas this was mainly the preserve of Romanians, who have dropped in number (in my playground, at least).