I've used PH for years, and have paid the shareware fee. It was a godsend at first, blocking lots of unwanted junk. However, support for this product has deteriorated significantly in the last year or two:
* Bugs are not being fixed (I've reported one several times).
* Updates (or, rather, lack thereof) do not keep up with Safari versions.
I realize that this is shareware. However, I *did* pay the fee that the developer requested. I'd pay more, if i were confident that the quality and support would return to their previous levels.