As crazy as this seems, if you are on a ticket with connecting segments, WN "lifts" your entire fare (takes it) once the first flight takes off. If you get stranded on the way and make other arrangements to get home, there is no refund or fair apportionment of the fare paid, just a refund of fees. This has happened to me twice, I recently referenced it MCO-(BWI)-ISP, the other time while stranded MCI-MDW-ISP I took another airline to LGA.

https://www.flyertalk.com/forum/34937084-post20.html
https://www.flyertalk.com/forum/28577421-post10.html
https://www.flyertalk.com/forum/28573169-post4.html


You maybe able to push for a refund of the points but its not going to happen systematically