For context, in the Netherlands (where Mollie was founded) sending payment requests by text took off when one bank set up a service geared for consumers that provided this (Tikkie [1]). Mobile payments were common place before this, so customers were already used to this.

Taking this to the next level, by having businesses use this is a great and logical step.

[1] https://www.abnamro.nl/en/personal/internet-and-mobile/apps/...