This is actually an underserved niche, speaking from personal experience. Kudos to OP for acting on it! Family always comes first, I can’t help but think that OP could likely have 10-20x’d MRR with just a little more focus on marketing?
I find this comment very interesting.
The vast majority of SaaS businesses that are shown/sold/started here on HN are complete mysteries to me in terms of their domain and customer base. It's rare that I see a business about which I can say "OK, I can see a need for that product." This one is yet another example: I simply can't fathom ever finding a use for this feature.
Please understand, I don't mean this in a negative sense. OP has definitely accomplished something to be proud of. It's just that my section of the industry (embedded systems) is so far removed from general web apps that I have no context for the use cases of a lot of what is introduced here.
The visits via those sources are competing with other tweets/posts in the feed. If there's a visually compelling social image, the likelihood of the URL being visited and/or shared increases.
Source: https://buzzsumo.com/blog/how-to-massively-boost-your-blog-t...
(Obviously this doesn't 'prove' that a more-visually-compelling image does better than a basic one, but it seems like it'd follow, given the inclusion of the image at all performs better than no image).