price increase for spyblaster

So in Dec of 2011 I paid $9.95 US for Spyblaster pro. Now the price for this has gone up to $14.95. I am not that good at math but it seems as if it has increased 50% in one year. Don't think I will be participating in this as I expect that next year the price will be around $21 if the trend continues.

 

I use just the free version of SB, but think my comments are still valid.

Sure, this "trend" might continue, but your math (particularly involving series and progressions) is way off base. This was the first increase in many years, and yet you seem to feel it's somehow transformed into an annual event, with no evidence to support that. Heck, considering inflation, the cost of the Pro version up until now has in effect become cheaper and cheaper every year.