I agree on the time limit thing (I propose once a month though - easier to keep track of), but think we should still have the option to immediately request a sample if your offered sample is requested, like now. This would help breathe some life into this thread.
Also, I think we should enforce a limit as to how many samples you can offer, as originally planned, so more people have the option to share and will get on board. More people offering samples means more people requesting samples and this thread gets more action. Furthermore, if we enact the time limit til re-requesting, it isn't so necessary to offer so many samples in an attempt to get your sample requested so you can request again. You just wait your month and request again.
Furthermore, after the difficulty with Longburn, we might need a rule like "if three people request your samples, but don't get a response, your sample offerings are removed until you repost them again." Longburn has offered a lot of samples here, but isn't responding to requests (for whatever reason, not trying to put down Longburn here, just make this thread more efficient), so those samples are taking up sample space on here that could be offered by more participants.
Lastly, I think this thread needs more PR. We should find ways to bring it up to other Puffers to get them involved in both requesting and offering samples.
Like: (1) noting that you are smoking a sample obtained from this thread when posting in the Morning/Afternoon/Evening Smoking Now threads, (2) maybe a separate thread that lists the changes we are discussing once they are fleshed out, ie. "Check out the NEW & IMPROVED Pipe Tobacco Share Thread!!!", (3) and also informing newbies that this thread exists and to take advantage of it after their newbie sampler as a way to keep trying new stuff.
Right now there are a lot of samples, but only a few participants really. Less samples offered per person will allow for more participants, and a time limit til you can re-request will create more action; I really think this would get this thread moving.
That's my anyway.