Iberia is offering a new promotion, you will get a 50% bonus if you purchase Avios.
The maximum you can buy is 300’000 Avios for 3601€. The promotion is valid until June 24, 2022.
Login and buy Avios with Iberia here.
Avios purchased at Iberia can also be transferred to your British Airways account, while there are as well some good uses of Avios at Iberia itself.