Around 18-19 years ago... the ECB experimented with another format of cricket called "Power Cricket". This was probably before the T20 cricket established its hold. It was played for a shorter duration. I don't remember exactly, but I guess each innings composed of 12 overs. The major difference with this format was that on top of 4s and 6s, there were 3 new types of boundaries. Depending on the length of the sixer, 8 and 10 runs were given. 8 runs if the ball landed more than 20 meters beyond the boundary line and 10 runs if it landed 40 m back. 12 runs were awarded, when the ball hit the roof (this format was played in stadiums with retractable roof).
I think you are talking about
Cricket Max which is invented by former New Zealand cricketer Martin Crowe and it was not ECB who developed that but it was New Zealand, i still remember getting confused and Sachin playing one match when the ball is hit at a certain area you will get double the runs and hence max cricket

and the reason it was not a success is because it was really confusing.
100 ball cricket will be successful if they can make it simple rather than confuse the audience, a new format means new advertisement revenue and that is what they are looking for.
Nope. I was not talking about Cricket Max. Power Cricket is a different format, and it was invented in England and not in New Zealand. They never got any international players to take part in the mini-tournament, which lasted just 3-4 days. They played around 10 matches and that was it. No one ever heard about this format again. To tell the truth, I liked the Power Cricket format. At least I felt that it was better than T10.