It's well-known that Capes to RuneScape gold Accomplishment are responsible for a dramatic increase in the number of RuneScape99s. Although there are more players than ever before in RuneScape the majority of 99s are due to people wanting a skill cape.
It is rare to find people who love a particular ability and have passed it on to others. Most people with 99 (and I've talked to people about it) dislike the more advanced levels. Why train it if you hate it? After all, it's only an exercise. Why would you have to work for a cape? While you might gain some authority, it's a loss of popularity if your 99 are considered 'buyable'.
Let me proceed to the next point. A 99 is a 99. Each one of them requires time and effort. What is the reason why people are decreasing their skill levels for being 99 in Fletching and Cooking? What is it that has made a 99-skilled skill a requirement in the last few years?
My opinion is that the skill cap has made a significant difference in the lives of individuals. People who wouldn't have thought to get a 99-skilled skill one year ago wouldn't even consider it today. RuneScape can be described as an online game. You are supposed to have fun with games, and not be dragged away from reality.
The "Skiller Level" formula works similar to your Combat Level formula. This is not an official formula. (Round up.) Thieving, Agility and Slayer have no direct relations to each other. Thieving, Agility, Slayer, and Thieving are all resource skills. They can be cousins for any other ability. Fletching and Crafting. Construction - WoodCutting and Smithing. The second option is more preferred due to it being able to have the identical minimum and cheap OSRS gold maximum requirements for P2Pers and F2Pers.