After Jehovah “[executed] judgment on all the gods of Egypt,” his people were joined by “a vast mixed company” of non-Israelites. These foreigners may have turned to Jehovah when they saw Moses’ warnings about the Ten Plagues come true…
This is a very significant thing JW is stating. First, it relieves them from having to keep looking out for the start of the 'great tribulation'.
Second, it does away with the hard-line claim that you must be JW to be saved. In essence they've taken the same position as all other Christian religions.