Iberia Plus members can get 1,000 free Avios by signing up for Hailo taxi app and having frequent flier number added to their profile.
Iberia Plus members also earn 10 Avios per 8 euros spend on Hailo.
You can access Iberia Plus web page for this offer here.
Note that you may have to use one of the GPS apps to set your location to Madrid or Barcelona (if you don’t happen to be there) to get the Avios.
This is an easy way to get 1,000 Iberia Plus Avios that you can transfer between various Avios accounts later if needed. I learned about this offer on FlyerTalk post here.