1. The software price is reasonable as long as it makes a profit and there are customers who are ready to pay for it
2. Being implemented as a PowerPoint plugin iSpring resides in the PowerPoint's address space which significantly speeds up communication between iSpring and PowerPoint. Thanks to that solution the 100 slides presentation can be converted in 1-1,5 minutes instead of 10-15.
3. It is incorrect to compare price of PowerPoint and iSpring since they are products of different functionality. It is not absurd to have a plugin which costs more that a program it plugs to.
There are hi-end graphic cards which price is 5-6 times greater than the price of a mother board they plug in.
When you purchase a movie on a DVD the Movie price is 10-30 time greater than the price of an empty DVD.
4. There is a free version of iSpring. You may find it at www.ispringfree.com