Found this on a website that gives advice to high school athletes about official and unofficial visits:On a related note, doesn't a school have a limited amount of official visits they can give out? Otherwise schools like Hawaii would go broke paying for official visits!
"Because the schools are limited in how many visits they can provide, any official visit in those sports tends to indicate the coaches are very interested in the prospect. In other sports, it is the budget, not NCAA rules, that limit official visits."
From what I read, a school may limit official visits because they simply don't have the budget to do a lot. I am guessing the major football and basketball programs probably give out a fair number of official visits every single year because their budget simply allows for it...while smaller programs may just not have the resources. A school that may be successful in basketball only (like Marquette) may have to really stretch their official visits out to those they are truly interested in whereas Kentucky or IU may be able to send out an official visit for players they are taking a fliers chance on to get interest.
Knowing that, Tyger may see that DePaul wanting to get him in for an official visit means a lot because getting that means he is an incredibly high value target for that school whereas it may not mean as much to other programs like Purdue, for example.