If you read the regs, as I suggested, you will see that a school cannot even send recruiting material to a prospective student-athlete until the start of their junior year in high school. If you do not think an offer of a basketball scholarship is a form of recruiting material, we'll just have to differ in our reading/understanding of the regs.
I know that schools have ways of insuring that their interest in a particular recruit is communicated to that recruit. I am not in any way actively involved in recruiting, but, from what I have read and heard, communication to a player's coach is frequently used. But, even then, a school must be careful in their phrasing so that the information is not transmitted as a definite "offer".
Perhaps someone who has been actively involved in the recruiting process, either as a parent or an athlete could weigh in and explain some aspects of the process more accurately.
Jim
"An institution shall not provide recruiting materials, including general correspondence related to athletics, or send electronic correspondence to an individual (or his or her parents or legal guardians) until September 1 at the beginning of his or her junior year in high school. . ."
"13.4.1.8 Responding to Prospective Student-Athletes Request. Institutional staff members (including athletics staff members) may respond to a prospective student-athletes letter or electronic correspondence requesting information from an institutions athletics department prior to the permissible date on which an institution may begin to provide recruiting materials to a prospective student-athlete, provided the written response does not include information that would initiate the recruitment of the prospective student-athlete or information related to the institutions athletics program (e.g., the reply contains an explanation of current NCAA legislation or a referral to the admissions department). An electronic reply must be a permissible form of electronic correspondence. [D] (Revised: 5/26/06, 4/20/11, 1/18/14 effective 8/1/14)"