"Thanks for backing our Kickstarter. You will receive the Clan Invasion box within the next 6-18 months. There aren't a complete set of rules in it though, so you won't be able to use it unless you buy all these other almost-always-out-of-stock products!"
Not putting in the basic rules of BTech, which don't take up that much room, doesn't make any sense to me.
BYE
Which, if you did any digging is a flat out falsehood and misrepresentation. First, ALL of the main line rulebooks I am aware of are available as PDFs- I own a physical copy of TW but within the last few months broke down to buy TM, TacOps and . . . hm, not sure I bought StratOps but I have Campaign Ops as PDFs. CGL has also recently announced a effort to keep print runs of the core rulebooks more frequently- Total Warfare came out with a retro cover (however you feel about that), not sure about TacOps, and Tech Manual just came out with its own new cover.
Second, as mentioned there are free versions of the rules available on the website that cover a very basic simple set of rules. Its hard to imagine someone could get those rules, comfortable enough playing with them to look for expansion, and be unable to make the leap to Clan & SL gear rules.