This is what I've noticed: UL targets a few key recruits and offers them in the summer and/or early fall. The coaches are careful to avoid over-recruiting - giving out more offers than available for that year - like a lot of schools do now. (Those schools usually have to place kids at JUCOs, grayshirt them - delay full-time enrollment for one semester - or flat out pull offers because they can only sign 25 recruits a year.)
UL doesn't just offer players so they can say they have "X" number of commitments. The coaches know nothing is binding until a national letter of intent is signed. They then do their best to give personal attention to those prospects and give out additional offers if warranted in the fall and winter. If you remember, two of this year's true freshmen contributors - Ladarius Green and Devon Lewis-Buchanan - committed late in the process.
Some other mid-majors - cough, ULM - got a lot of early commitments but always lose a few down the stretch. And a high number of commitments doesn't translate into success. Remember ULM last year and its huge JUCO class that was supposed to have a big impact?