1 - Blockstream took a bunch of VC money and will need to somehow turn a profit. The LN is their only "product" therefore LN must somehow generate revenue for blockstream
Lightning Network is a Joseph Poon invention. You're probably thinking of sidechains.
https://lightning.network/lightning-network-paper-DRAFT-0.5.pdfPeople seem to mix these two up. There's only 1 developer on the Blockstream payroll that is working on LN (as far as I know). Would the whole company put only a single developer on their "only product"? No. Another thing that people seem to forget is that they're free to develop LN themselves if they have the adequate skills to do so.
Oh, so what other products/services does blockstream offer? How else do then plan on generating revenue for themselves?