I think it acts like a "net" to see how far reaching the clubs appeal is, to attract good players from the nation. But I could be wrong on this. In general, you should see a small increase to the youth intake quality
The German version can be found in an extra folder "German Version". If you play the game in German, delete the English version and replace it with this one. SALARIES MARKET VALUES & SPONSORS This file changes the financial behaviour in all nations in the 3 main areas "salaries", "market...
which gives you a hint of thequality of newgen players generated at youth intake day, and how good they may become in the future with a great development program put on the