There are so many different scholarships with so many qualifications that it is impossible to generalize. From our experience, though, the great majority of scholarships go to students with cumulative GPA's of 3.00 and above who are enrolled full-time. I've heard that millions of dollars in scholarships go unclaimed every year.
Most scholarships have many applicants.
The information you're hearing represents unused employee tuition benefits, which are available only to those people working for the companies in question. I've received things in the mail from companies that want to send me scholarship information, for a fee. Be aware that the company itself does not and cannot offer you a scholarship. It's then up to you to write for an application and then complete and send the application on time. Then you wait to hear the results of the competition.