As debkellie says, it is wise to save in another way any online recipe you are fond of. That could be printing it out, taking a screenshot, saving as a PDF (as Deb suggests) - whatever works best for you.
When we get a broken link report, if the recipe is gone completely then we remove the link. If it is an online recipe that is part of an indexed blog/website then we delete the recipe. If we can find the recipe elsewhere then we repair the link (and we then email you to let you know that the link now works).