the idea is that older backers of KSP are more seasoned contributors to the community on average, and were more instrumental towards making it be well known
...that and, let's face it, it's DLC. squad isn't independent anymore, they have a higher authority to answer to. be happy they held their ground at all
gonna eventually submit stuff to the SSTO contest. doing some ~~science~~ right now since it's been a while for me when it comes to serious aero design in KSP