iirc it doesn't cap till like 200 or so chain. At high chains it definitely beats the double campaign... but for people who were just burning rings probably not. And then if for some reason you lose your chain say overcrowding (pretty big in reisin right now) makes you barely not make it in time then bam your xp goes down to like 1/4-1/5 of what you were getting and time to build up again.