I'm totally biased here, but I feel like the newsletter option in the chart should be higher. I mean, how much visibility will you get from a low-follower Twitter account or a small blog?

I run Web Tools Weekly (https://webtoolsweekly.com/ - ~11,500 subs) and Tech Productivity (https://techproductivity.co/ - new, ~1000 subs) and I can tell you that any good open source project that fits will get great click through rates.

I also recommend any of the newsletters by Cooper Press, which have way more subscribers than mine do (https://cooperpress.com/publications/ - see the top comment in this thread, by the founder of Cooper Press).