Indeed as you said. Let's say, in 2017 you pay $$ for Superseries tournament. Then suddenly it become $$$$ for Super 500 tournament and you got bonus 6 matches overall (3 QF matches & 3 SF matches). You pay double price when the overall package didn't change too much, AND the bonus isn't interesting at all (more TV broadcaster would reject it I think). To attract more TV broadcaster to buy the package and to get more countries broadcast the badminton matches, It would be fair by giving the same price as 2017 (7 SS + 5 SSP + 1SSF) plus a special price if any broadcaster want to have World Tour Level 2 (Super 1000) coverage. IMO 20-30% increase would be fair to get the same package plus Super 1000 (3 tournaments). Easy analogy : Get more buyers come with the same price, better than get total income increase by raising the price.