As i see, Indeed has better scrapers and SEO for a start. It established itself as a market leader in this business, also built simple products like letting companies directly post jobs, making it easy to apply from mobile(they acquired mobolt for this) and also working on Indeed Premium( a hired clone). With that kind of traffic, if simplyhired had launched any decent products to help recruiters, they would have easily been counting a lot of $$$$. A stale product is the reason for its death.