Do acceleration products really work for every request, 24x7?

[green-watch.org]

What concerns me is I never see prices advertised on their websites. I got contacted by one of the companies and it said the starting price was a few thousand and then there is a yearly maintenance fee; most small businesses and start-up companies simply can not afford that. I do not know if all the companies are that expensive. Another concern is I have asked for website urls that use their services so I can run it through Pat's pagetest but never get any responses. As far as two videos are concerned, would the companies send back average time or their fastest time and if it is average time how many tests were done to get the average?