Several leading corporate scholarship providers are complaining about the rules used by some wealthy colleges for calculating students' expected contributions to their college expenses, Bloomberg reported. Some colleges rescind some or all of their aid offers, and impose minimum student contribution requirements, on those who receive large grants from independent scholarship providers. The colleges' rules, some complain, effectively punish students for winning scholarships. College officials, on the other hand, maintain that the rules treat all students equally and maximize the availability of aid funds.