For the test, I ordered 30 links from this service. They were placed within a month. I checked the report, and all the links were active. Two weeks later, I checked the report again and found that 5 links had been removed from the pages. I contacted support, and they replied that the links were being replaced under warranty. After another 2 weeks, I checked again, and indeed, new links had appeared. It's hard to say how long they will last; only 2 months have passed, so I will keep observing.
