With percentages!

AFAIK, you have the option to enable ads on your lock screen. It’s not something that’s forced upon you. Last time I took a look at the functionality, they “paid” you for the ads and you got to choose which charity to support with the money.

“Купувай европейско” would be the Bulgarian translation, meaning “Buy” (as in in general) “европейско” (European)

That’s Rem, not Rei