All schools do it for their recruiting visits. They lay out a table of all equipment from jerseys, helmets, customized gloves, cleats, Nike sneakers, to pretty much everything.
From there, it's up to recruits if they want to just look, try on, pose for pictures in it, etc.
I agree with you that you are seeing it more, and this would be to the ongoing increase of social media. Not all but many recruits like the publicity and attention of posting a picture in a school's jersey and then getting 100 retweets and 50 new followers, and some just like to see what they would look like in that jersey.
You learn not to read into it too much. As that same recruits may take visits to 20 other schools and try on 20 different jerseys, but at least they took the time to visit your school and put it is as an importance.
Recruiting has changed so much over the years, and I truly believe social media is the reason. 10 years ago, you didn't have 1/4 of the amount of "decommits" (which is a hilarious word to me as I don't think many know the definition of commitment. Kids visiting other schools while "committed" to another school) as you do today.