If you *really* want to be sure the auction partner is NameJet (because it’s a name you cannot afford to lose in the drop), you can email the technical support team at SRSPLUS and ask them if they follow the same expiration/auction procedures as Network Solutions. Be specific and ask, “Will the domain name, (fill in), expire and be available for auction on NameJet.com as the process is listed at https://www.domainsherpa.com/how-to-grab-an-expiring-domain-name/?”
1) pending delete auctions. These are domains that were not renewed and are going through a pretty complicated drop process. You can backorder these names at the auction venues and then each attempts to "catch" the dropping domain. If one is successful you win the domain at $59 if you're the only one to backorder the name. If more than one person backordered the domain a 3 day private auction is held. Once the domain goes through the drop process, the back links have pretty much zero SEO benifit to the new domain owner.
* “Thousands of domain names that reach expired status never make it to any auction service and are released by the registry.” I think this is only if the registrar a) has an auction partner and b) nobody places a bid at the auction house. In that case, it drops normally and is deleted from the registry and available for anyone to hand register — including backorder services like SnapNames.com or Pool.com. I’m not sure why a registrar wouldn’t list an expiring domain name at the auction house as it could lead to extra revenue for them. Can you, Jamie?
Finally, if you were to manually check for drop domains, you have to jump through many hoops. It's a very labor intensive and often confusing process. When you see that a domain name is available, you shouldn’t just stop there. You should also pay attention to how many backlinks it had, how niche-specific the domain is, what kind of websites link to it, did it get signals from social media, and other indicators of quality. If you were to try to look for drop domains manually, it can be a very, very intimidating process. Thankfully, there is an easier solution.