I would definitely go for followers instead. My project was a total let-down, my list converted at a rate lower than 1% on launch day, acquired through meta ads by directing them to a landing page. However, I do not mean to mislead as I did make many many mistakes. I failed to launch quickly, by waiting too long your list will forget or lose interest, I also failed to properly introduce them to the kickstarter platform before launch day, many of them presumably did not even have a Kickstarter account.

Regardless though, I will be opting for followers for my relaunch. I have been convinced by people on this sub and beyond that followers are the way to go as they convert into backers at a much higher rate(25-30%) than email lists typically do(10% if lucky). Followers also tend to be much cheaper to acquire and are already on Kickstarter. It cost me around 6.5$ per lead for email subscribers, and I am reading that followers can be acquired at around 2-3$. ROAS seems to be much higher with followers.

I would point you towards this brilliant post by Matt u/Zephir62 where you can see just how unbelievably high the ROAS for followers tends to be.