Context: This thread is specifically aimed towards addressing the issue of acquiring debt bonds for the Solaris United rank up sacrifice.
Simply put, acquiring the various debt bonds can be a chore. The more rarer debt bonds (advances, familial, and medical especially) do not drop/appear often enough from bounties or Ticker's trade offerings. I want to bring up medical debt bonds specifically, as their drop chance is extremely low: 20% on the first stage, then 12.5% on the second and third stage--and you need 35 of them to get to Old Mate.
Compared to the other landscape syndicates (and we will include the Holdfasts in this brief discussion), Solaris United has the most difficult to obtain rank-up materials--as their drops are heavily dependent on luck. This is bad; this randomness can be frustrating and can dissuade players from reaching the higher ranks of Solaris United--and consequently gate access to the heists from Vox Solaris.
In light of the recent influx of the various "pity systems," I have a proposition to making debt bonds more accessible: have purchasing debt bonds function like trading for Voidplumes. Ticker would have guaranteed offerings for all debt bonds types that would rotate after a certain time passes (preferably 1 or 2 hours), much like how Yonta has guaranteed offerings for all Voidplumes that rotate every 8 hours. And I would suggest to keep the little bonus training/shelter debt bonds in the packages, just so players have the extra debt bonds to use as they please.
Or perhaps an even simpler solution: just make the rarer debt bonds appear more often in Ticker's offerings.
Edit:
After some more thorough thinking, I have concluded that the problem may not stem from the drop chance of the debt bonds--but rather the amount that you need to sacrifice to rank up with Solaris United. With this new perspective, perhaps a better solution is to just decrease the debt bonds needed for ranking up.
While this proposed solution doesn't fix the issue of the drop chance of the debt bonds, it at least ensures that the grind doesn't drag out for too long. And seeing as debt bonds aren't critical long-term resources, this might be a better and simpler solution that will greatly benefit players who are working their way towards getting to the rank of Old Mate in Solaris United.