This happens more often than you might think: by doing basic steps to make your product usable, it suddenly becomes much more useful and in-demand than you anticipated. More examples are:
- Force businesses/streets to add a curb lip for wheelchairs -> Stars above, suddenly it's easier to accept deliveries and bring in luggage!
- Optimize site for slow connections, suddenly you have a torrent of previously-unserved customers. [1]
Edit: Turns out it's called the Curb Cut Effect:
https://thingofthings.wordpress.com/2014/11/15/the-curb-cut-...
[1] Summary at this HN discussion, follow through to the story for more details. https://news.ycombinator.com/item?id=13601977