so if I use my everyday card - Capital One Venture X and link it at Bilt
- will the spend on Cap 1 get me Bilt Status or do I have to go through the app ?
Only flight/hotel spend through the bilt portal, bilt dining spend and lyft spend on linked cards counts towards bilt status. If you download the app and look at the elite status section, it explains it pretty well.
FWIW I've never bothered linking any card.