Do people actually play post-jam updates?

Serum Run is my most successful Compo entry to date (got 19th in Mood, and personal bests in Overall and Graphics), and I've released a post-jam update with some music, bug fixes, UI improvements, and a bit more content.

A dogsled rushes across a dark Arctic landscape.  Text reads: Wild Bill and Gunnar are starting to fall in love. Player options: "Allow it" or "This is not the time and place for romance."

I have more ideas for narrative content, but part of me feels like continued work on the game will have seriously diminishing returns, because who's gonna play it now that the ratings period is over? I mean, unless I'm willing to put serious time & money into developing a "product" that can be marketed, kickstarted et cetera, what are the odds that enough people actually play it to justify the additional effort?

Maybe it's different if you make the top 10 or have an existing online following, I guess. But it seems like after the rating period ends, sharing your game around online stops being part of a pro-social community activity and starts to verge into unwanted marketing/self-promotion, and the quality bar to justify this sort of marketing is so high.

What do y'all think about post-jam updates and diminishing returns in terms of potential viewership?