That’s interesting. "Satisfaction guaranteed or your money back" is a common guarantee in the US, although often with a time limit.
Not really interesting. Consumer law guarantees certain rights to both vendor and buyer which cannot be denied for a year, maybe two.
The statement you quoted is a business decision by the vendor - time limit 30 days or so? Who pays for all the fuses that are returned within that time period, because they didn’t like them?
Either you make a product that people wanna keep for the duration of their expected lives, or refund them if it is faulty. Not simply because ya tried and didn't like - that is such an expensive business decision whereby the consumer takes on the risks of other consumers before him who were didn't like the fuse.