Posters on this site has addressed the issue of publicizing commitments on numerous occasions. Some folks like it, some don’t have strong feelings and some dislike it. I fall into the last category.
By NCAA regulation, D3 institutions are not permitted to publicize recruits until the matriculation deposit is made. Honestly, this rule makes a lot of sense, because these commitments are non-binding - on both sides.
I don’t think the college coaches care much, and they may actually like the publicity that accompanies them. Coaches of elite travel teams want to post the commitments for marketing purposes.
The folks who don’t like publicizing commitments are the admissions folks. Take the NESCAC, the league makes a big deal that all admissions decisions are made by admissions and not by coaches. Specifically, the NESCAC common admissions policy says: “All admissions decisions are rendered and delivered in writing by the admissions office only. Any communication regarding the status of admissions decisions conveyed by non-admissions personnel should be considered preliminary, unofficial, and subject to change.” Thus, the framework in the NESCAC is that nothing is final until the acceptance letter is in hand and the deposit is submitted.
I just don’t see the reason for an athlete to tell the world that they are going to a particular school before admissions accepts them. For bragging rights? What happens if something goes wrong? That’s when bragging rights become explaining rights. It seems to me that humility is one of the better attributes an athlete can develop, and that includes the commitment process. But of course, this is just one perspective. As noted, others see things differently.