I suppose even DVR platforms such as MythTV recording off of TV would be excluded here, as per your 'automated'... although it's a bit of a grey area, VCRs could be automated, but not really without changing the tape in a home setting.
Another grey area is more detailed "collecting", such as older video/audio, rarer stuff which does often disappear from torrent sites and such. An example being old TV series recorded direct from TV, to tape -> digitized. But even this, with personal intervention at each collection event, fits in terms of it being hard to fill up drives.
Really, preservation is the cost. Primary live/online, along with a RAID method (hardware over software raid typically) capable of per-disk patrol reads and overall raid consistency checks are vital*. Checksums of all files are a requirement too, and an offline secondary server with a full backup synced every so often.
Otherwise bitrot sets in, and you don't know. Either at the disk level, the raid level, or the filesystem level. And that's where the secondary comes in.
Of course, that doesn't help in case of explosions, aliens, or fire. One needs a secondary offsite for that. But my point is, actual real archival isn't simple.
* if you have a raid, even software raid and you're not doing patrol reads and consistency checks regularly, you're not really doing it right. LSI cards tend to require patrol reads and consistency checks set on, and consistency checks schedules (say, Sundays).
And of course if you don't have a script to dump megacli logs to syslog or what not, you don't really know if the raid is having issues. And you don't even know if consistency checks and patrol reads are running.
(In LSI terminology, patrol reads scan entire disks individually, looking for block read errors, and if found, that block is re-written from redundant data in the array. Consistency checks look at the status of the raid, especially checksums of all disks per virtual disk block. Different checks, both required.)
Play on fears of losing everything. How it's too difficult to secure data. How the risks are too high.
It's really no different than convincing people they need all sorts of weird lotions, pills, or gadgets, lest their lives will fall apart, their health decline.
The bonus here is, it's a client base unable to help themselves. Akin to selling medicine to a hypochondriac. I envision entire divisions doing deep-research into clients, with sliding scale cost. The ultra rich hoarder will have their collection stored on the back side of the moon, SpaceX delivered data pots, with solar, redundancy, robotic maintenance, and more.
"My word, it's time to hoard!"
As others have pointed out, time and mental attention become the cost when you remove physical space from the equation.
The only tool I can think of where I feel like I'm wasting time is Calibre. The EBook community really dropped the ball by letting one weird guy and his quirks determine the entire organization of the ecosystem because he wrote a really good conversion tool. Luckily books take up so little space it's fine to copy them into Calibre and duplicate them back to a different organization method.
Thinking that various tools existing means no time or attention is paid to organization anymore seems like a very optimistic view towards those tools. To your point with the Media Hoarder thread, relying solely on a single tool to organize your stuff isn't a common practice, anyway.
I have a NAS with 42TB of capacity at the moment. I'm running about ten web services to present or organize certain types of media. It still takes time to add new media to the appropriate service, and there's still a ton of data that doesn't fit into any of those services and must be organized manually on the filesystem (if it's organized at all).
When I think of "data hoarding," I'm not just talking about scraping torrents for commonly available TV shows into your Plex instance. I'm thinking of any possible data on the internet-- that includes one-off videos from not only YouTube but lots of smaller websites (Vimeo, Dailymotion, Yahoo! Screen, etc), software of various types (OSes, games, miscellaneous apps), images that may or may not be grouped together and may or may not include textual accompaniment, documents that might be in one of half a dozen different formats, etc. And then of course, you also have original content that you create in the course of living, whether that's photo albums from your phone, receipts you scan, or whatever else, which you probably don't want mixed in with other peoples' stuff that you downloaded.