Why are there advertisements on podcasts accessed outside the UK?

On 1st May 2018, the BBC introduced advertising on podcasts delivered outside the UK.

For more information, visit the BBC World Service Radio FAQ page. You'll see the Frequently Asked Questions - Advertisements on Podcasts section on the right-hand side of the page. 

If you're in the UK and are incorrectly getting advertising on podcasts, visit the following page for help resolving this: I'm in the UK. Why am I getting advertisements on podcasts?