The deep tissue samples sell for a decent amount I suppose but beyond that, what these are for remains to be seen.
This has forever been the problem with tissue sampling; FD never established a reason to do it besides credits, and because of the busted economy, those credits are virtually nonexistent.
Prior to the Thargoid War we've had:
Mollusc Brain Tissue/Fluid/Membrane/Mycelium/Soft Tissue/Spores[1]
Pod Core Tissue/Dead Tissue/Mesoglea/Outer Tissue/Shell Tissue/Surface Tissue/"plain" Tissue[1]
Thargoid Scout/Cyclops/Basilisk/Medusa/Hydra Tissue Samples
... and although not Research Limpet commodities, we've got the Thargoid Sensor/Probe/Link and Resin/Tech Samples/Biological Matter.
Of those, Probe/Sensor/Link and Cyclops/Basilisk/Medusa samples are the only ones that have had practical uses, but only situational uses and not really recurrent.. being access to the Thargoid structures and activating it, and for the Ram Tah quests for the samples. Resin/Tech/Bio was used for a mission offered by Palin out of Obsidian Orbital, but then that got nerfed/removed(?) and now they're just for selling on the market.
But those were just a hop-skip-and-jump from the bubble. Pod and Mollusc samples you need to literally traipse thousands of lightyears to get and haul back. We had that one CG which was great, but also came with a lot of complaints about the mechanics (which involve a lot of sitting around doing not much). Notwithstanding that, the fact you'd go all the way out there, grab maybe a few hundred samples then come all the way back just for not much more than a million credits... it's just been a massive void that FD have never dealt with (and, not to derail, but should have dealt with well before any of their recent new content initiatives... but i digress)
The Thargoid war has introduced a general purpose for tissue sampling... unfortunately by making it the most effective means to deal with the Thargoid war means a sorely-neglected aspect of the game is now thrust into the headlights for many players, some who didn't even realise you could tissue sample... and the warts are pretty clear.
At least the Thargoid War uses
are something, but I've been a broken record about the neglect in this mechanic for years. It's just another landmine FD set for themselves years ago and neglected to deal with because it wasn't an FOTM money spinner.
It needs something better.
What I find far more intriguing is why the titan pulse scanner highlights these!
Aside from the nearby launch tube residue spots that can be abrasion blastered off there doesn't currently seem to be any way to interact with these launch tubes directly, so why highlight them quite so specifically and clearly like this?
What Factabulous said, I think it'll just be the location where you get those from.
However, the optimistic part of me hopes there's
some sort of interaction with it, even if that's not right now.
[1] I still routinely discover people who never knew non-Thargoid space organics could be sampled, they thought they were just there to look pretty.