It boils down to several things I suppose, and I'm no expert at analyzing them in detail, but some random speculations, most of which have already been mentioned above:
- A lot live with it fine, and even those who initially struggles significantly can feel much better soon enough. Donating to tinnitus research is not something that even crosses most people's minds, or they shrug the thought off by thinking "oh well, someone else will donate, I can go buy a Big Mac instead", or "I could only give $10, it doesn't help anything, so I won't bother with even that."
- Tinnitus is not something many people want to share or talk about with their friends and online buddies. This is abundantly clear from the lack of social media engagement. It's very difficult for a person to click that share button. Maybe they think they don't have any friends who would be interested, or maybe they feel uneasy about sharing about their tinnitus (knowing how difficult it is for healthy people to really understand the effects of chronic tinnitus doesn't help matters). It's sometimes difficult to talk about it with one's real life friends as well. And hence few know the struggle associated with tinnitus, except for the sufferers themselves (and hey, sometimes even those with milder tinnitus may not fully grasp what more severe tinnitus is like; after my onset, I could never have imagined the level I'd be struggling with these days - and who knows how much worse it could still get?)
- Those who struggle for extended periods of time with tinnitus, are debilitated by it, and would want to help research, they may also be facing serious financial difficulties at the same time due to not being able to work. The uncertain future may make people to save every penny for them and their family - this is quite understandable.
- About celebs: tinnitus isn't media sexy. I know for a fact (via a reliable contact I can't mention - but this information isn't that shocking!) that there are several A-list celebs with tinnitus who want to keep it private.
—There are exceptions; William Shatner has been public about it, however in the recent years he has mostly just highlighted habituation (search for his tweets on Twitter and you'll see what I mean). I would hardly describe him as tinnitus advocate in this day and age; but many years ago it was different, when he did a video for ATA, talked about it with David Letterman, etc. Still, he does mention tinnitus once in a while, and that's more than most do - so all the kudos to him. Mark Ronson has endorsed BTA's Plug'em campaign. Unfortunately giving a quote and his face to the campaign seems to be the full extent of it; I haven't seen any mentions or awareness efforts on Mark's Twitter or Facebook. Beggars can't be choosers however, and giving the face to the campaign was very cool. Steve Martin gave $10,000 to ATA in 2013. Grimes (musician) has talked about tinnitus and how she had to cancel gigs because of it some time back. And there are of course other celebs too who have mentioned or done something else for tinnitus.
- BTA and ATA have both applied for funding - and sometimes received - from many sorts of potential sources. Of course it's sad - well, sad is an understatement - that e.g. BTA wasn't listed among the top 1,000 UK charities ranked by amount of donations a few years back...
- Ending this on a positive note: check out ESIT and TIN-ACT. It's encouraging the EU is funding these initiatives with millions of euros. There's also the LISTEN. Also the Frontiers research topic on tinnitus is in #1 place, and could very well win the research conference awarded by Frontiers. This will be known later on next year. Winning this can bring a welcome amount of awareness, and potentially help raise research activity as well.
- Another positive back story: Matteo De Nora, Team New Zealand's benefactor, who isn't much in the limelight, and his role in founding Tinnitus Research Initiative. TRI's donation page currently still states:
"The administrative expenses of TRI are covered by the founder, therefore we can guarantee you, that your donation will exclusively be used to support tinnitus research across borders and disciplines."
Oh shoot, I kind of went off-topic here in relation to your questions, I blame my 1 hour of sleep tonight! But yes, I know the major organizations are constantly thinking of ways to raise funds for their activities/research and, besides governmental sources, foundations/celebs/mega rich etc are surely also on the list. It's far from easy though I must say, foundations can put many other health causes ahead of tinnitus, and neither is it a piece of cake for any tinnitus organization to get face time with (higher level) celebs... but, have to keep trying (maybe utilizing various approaches).
Kind of mysterious and vague. If you aren't comfortable sharing the details in public, I would genuinely urge you to share your ways with entities like TRI, BTA, ATA, AoHL, HHF - Hyperacusis Research also, it's sorely underfunded. I don't think you would need to travel for any of that; I'm sure any of these organizations can arrange travel by themselves if there's a need and a real potential for funding.