I'm not convinced that this is a "re"surgance, more like an emergance. THe unique thing about the Lions has to be its massive area to recruit from, with rapidly growing population and its perceived links to schools and country associations out that way.
Player development is business in the US education system.
When district clubs typically introduce a player to basketball that player is worth around $600-$700 in revenue to the club per year.
However, if a clubs are linked to large private schools, when a player starts at that club and is immersed in the school environment, making friends, getting to know staff and seeing facilities first hand every day and as a result of this exposure, they transfer to the school, that player is worth a relatively significant amount to the school in school fees. There is little incentive for clubs to see player development like a business but there is for private schools who can use this to attract new students, enrich student life and generate a strong sporting atompsphere within the school environment. If it works in the USA why couldn't it work here.