1. Add a donate button. Some folks probably just want to see more examples (or an example in their field, but don't have a specific paper in mind.)
2. Have a way to nominate papers to be examples. You could do this in the HN thread without any product changes. This could give good coverage of different fields and uncover weaknesses in the product.
I commit the images alongside the markdown files in GitHub. My site is has numerous images and there are logical groups of posts. I make those logical groups of posts a git submodule, so I don't have all posts on my machine (or iPad) at one time.
Working Copy (git for iPad) handles submodules reasonably well, I have a few that I'm working on cloned on it and others are not so I don't use so much space.
There are a number of church presentation systems that integrate with planning center to get data, like ProPresenter, EasyWorship, etc. You'd need to get them to update their software to support your system as well. The easy way for you to do that is to clone the planning center API worts and all, which means you're probably just building a planning center clone.
churchapps.org is competing in this space with open source software and the price of free for their hosted versions. I don't know what their adoption rate is.
The switching costs are large in terms of time and effort for small churches. It's often one or two persons leading the charge to switch. They may not fully understand how every person interacts with the system, but they would need to set up the new system and do a trial run, likely in parallel with the existing system. Then train staff and volunteers how to use their part of the system.
For me, it seems to be quite a few senders that fill my inbox. running
``` mailtrim purge ```
only finds about 200 MB of purge suggestions with a mailbox of 15GB, but deleting a few and running again finds a few more.
Gmail does some classification, it might be useful to have scopes that match those: promotions, updates, social and forums.
IMAP support would be useful for a yahoo account even if it's slower/less accurate. This is better than manual cleanup.