hi, i was just going to point you to something like this

wordpress.org/support/topic/plugin-wp-weather-please-read-plugin-will-cease-to-work-nov-15

but i see you've found the info.

i subscribed to weather.com's api service (didn't pay any money), and about an hour later i recieved what weather.com calls a 'magic key' (a big hexadecimal number). i'm not allowed to share the key and it gives me access to 100 api calls a day, but i couldn't find out how to actually call the api with it. i think the partner id concept is gone.

so maybe that's an option, i.e. if people want to use weather.com, they can apply for a magic key. but i've no idea if i can even use this magic key without paying first.