I'm curious about how you see the attack surface increasing when using 1Password. My knowledge of how it works is that it always stores your passwords in an encrypted blob that can only be decrypted with a combination of username, "master password", and vault password. So no matter if it's in Dropbox, 1Password's servers, or your own hard drive, if anyone obtains a copy of the password file they
still have to crack it before they gain access to anything.
Also I see your reply has been downvoted enough to become grey. (EDIT: Looks like between starting writing this and submitting it, you're no longer in the gray from downvotes!) I imagine it's because you made a blanket claim about spin and dark patterns without any supporting evidence. I'd be curious to know what you're referring to since I don't really keep an eagle eye on this stuff, I just use their product.
The one thing I do remember in the vein of "dark patterns" is how they effectively hid the method of doing a one-time payment for 1Password where you have to manage syncing and backing up the password file yourself. Seeing as I have no reason currently to do anything but make a charitable read of that situation which has been decried more than once on HN, I'd be willing to bet they did so for the following reason: They have had many problems in the past where a customer has lost a password file because they were not a power user and did something such as keep it on one hard drive in their only computer. (reinstalled windows, hard drive died, etc.) So they wanted to make something that would prevent that from happening for the vast majority of their customers that don't really understand stuff like backups, or don't have Dropbox, or who aren't part of Apple's ecosystem and have iCloud, etc. so that their passwords will remain safe and secure. So they made their own sync service and hid the version that would do local-only files so that only the dedicated users who really want to do that would find it and use it.
OR alternatively they're a bunch of greedy people that just want to hoover up dollars from our wallets, as people love to accuse them of here. Maybe a little of column A and column B, honestly. Something something needing to ensure they have a company that stays in the black without wanting to absolutely bloat up their own software so it becomes another useless Enterprise(TM) application with each passing paid version.
Also the only affiliation I have with 1Password is I have a friend I recently learned works for them, otherwise I'm just a customer. I just got into one of my little ADHD focuses where I really wanted to reply with something long and detailed, so please don't assume I work for them or something and am defending them because of that :)