So basically keeping the only and future customers is not much better?
Is there also a possibility to say something like "we are heading to release and as for now we hope it will be released at this month as currently there are no expected problems, but we still not finished and we'll keep you updated if there are any other unexpected changes will be met on our way" or "I know we are already 2 month late, but unfortunately we still have the problems, we hope we'll solve them in next X time, but as it not only depend on us (we still have HW screen problems), we can't promise certain date"
And it was me, dyslexic, non native English speaker. But i bet they have copywriters and PR people who can even make it better.

The small amount? I think you missed that there were 3 people and a high amount of TOHs (most Jolla fans got it) or you think that that Jolla sold billions of tablets? Just take a proportion of company with about 50-100 or now even more people vs 3 people and you'll see that for those 3 people they made not less work that Jolla. I think actually here loved by all "small resources" should be used, but toward TOH creators

And about partners, i bet those partners get details and information, and Jolla decide to make crowdfund project, they should consider crowd as partner and funder. It was there decision. Thye can't use supporters only for money. There are costs to this and that's not how it works with those projects. They can't just make this kind of project with crowdfund and act as it's regular one. You can see great example of Pebble doing it, they also did it with both watches and second time as not indie company, but already mature one. They also have limited resources and own product altogether with OS.
As i mentioned before, 3rd party companies that actually can make applications and HW addons for Jolla, actually would not make any, as all they see is delay and no futher info. It only bad for Jolla, as without apps and 3rd party support, all you have are Android apps, but then again why would i buy Jolla to run Android apps?

And do you really think that person that works at Jolla office do not have any clue? Or PR and communication people only come once in few months for few hours? Or do you think they have only one computer and as they type posts, devs wait for them to finish? No one here asks for all details.

True, but we and even Jolla itself talked about it from first day, but after few years the situation is the same, and that's what people should pay attention to. It's like the kid's story and the boy and wolves. Who just for jokes cried "wolves, wolves" everytime just to bring attention, while there were no wolves, but at some point when wolves came and he cried, no one believed him, as previous times he just lied about it.
Someone mentioned here how a lot of questions that Jolla got on meetings got no answer. And i would take SIP as an example, I remember back when i was at Jolla IRC, one of sailors said it's community part now to make the SIP integrations, but AFAIK community now made their part, but nothing came from Jolla. So Jolla are easy on pointing out how it's community responsibility, and when community makes it part, they just disappear.

EDIT2:
Oh you mean to stop development with community? They did not even started... They only talk about it. They did not make it easier for devs, didn't/don't provide info when it was/is needed. Actually they talk more about co-operating with users, just to make non-tech fans, who do not see whole picture and mass media to think how it's opensource and transparent, they use those words a lot. They promote this way. That's cheap PR. They just saw a huge opportunity in maemo and alike FOSS and linux fans and when Nokia was gone, they used it. But after all words are words, but deeds are deeds. While they do contribute to some opensource projects, but you need to understand that those projects they use, same as NVidia and even Microsoft contribute to opensource projects. And even few of them are the projects that most devs now work for Jolla(mer), so it would be logical for Jolla to control it and use it in own goods with option to limit devs/users where it's needed and use them(devs/users) for own profit. In analogy — while lately hackatons became popular, many companies now use them for own benefit, while the whole point of public community hackaton for not-profits, but today instead of paying money for devs, some companies just give T-shirts and small prices to "make" hackers want to work for free and make products.
Using opensource spirit and fooling hackers is the new way of corporations to control and use them