Disclaimer: I'm obviously biased due to my long-term involvement in Bitcoin.
I am in favor of narrowing the scope, and based on comments and close votes by some of the more active contributors here, I believe there is sufficient mass for this. My reasoning is that people come to the Bitcoin stackexchange for questions on Bitcoin, and (mostly) low-quality ...
I agree that we should narrow the scope of Bitcoin.SE. If you look through questions that are tagged as altcoins, you'll notice that many are left unanswered, and many are also fairly low quality questions.
I would suggest that we don't narrow down the topic too far. I think we could take an approach similar to what Bitcointalk.org does - to also allow ...
I just stumbled across some additional text that could be changed for better clarity:
An Eth-related question was posted on Bitcoin.SE.com, and then migrated to Ethereum.SE.com. If you follow the link to the (now migrated) question, it includes this text:
This question came from our site for Bitcoin crypto-currency enthusiasts.
Here is a screenshot of ...
There are stack exchanges sites such as ethereum.SE.com, which have a scope that is restricted to Ethereum. There are some other altcoins that have sites in Area 51 as well. The Bitcoin.SE.com site includes altcoins, because at first it was the only cryptocurrency SE site, and so of course it would make sense to allow altcoin questions.
Now, years later, ...
For the past years, it has been our policy that questions about other cryptocurrencies are on-topic. Since Monero and Ethereum each have their own SE now, we migrate questions about these there.
As you've noted, there's a discussion going on that touches on the scope of this SE: What should this site's name be when we get our new design?
I wouldn't ...
In my opinion, it is fine to edit old questions and answers like the example you provided if they're already answered and are good questions, even if they're now off topic. If they're not closed then they might as well be correct.
After initially spending some hours on editing a number of Sybil's posts to their sporadic viable kernels and providing feedback how they may improve their questions' reception, my approach has now been to
close obvious repetitions as duplicates
liberally downvote low-quality questions of the described pattern instead of expending further effort on them
Pieter said it well: "sufficiently generic things should probably remain on topic here anyway". Other answers on that discussion appear to also endorse general cryptocurrency/blockchain questions.
From what I understand, the main frustration was with being the kitchen sink for all the hyperspecific, lazily written, or obscure altcoin questions that hardly ...
I agree that closing the question you mention might have been stretching it. Maybe we could change the wording so that if the question is exclusively about the relationship between the author and a company that has some form of customer support, it is off-topic. That would make questions about interfacing open source software with a company API on-topic.
I agree to an extent, I think the questions like that are being closed because the knowledge is too specific to a single company and so is both hard to answer for most users with no experience with that particular company, and less useful for others in general because of its specificity. But yeah the example you linked is probably pushing that idea a little ...
I am the contact from Trezor team you mention in the text.
Just to offer an explanation:
Right now, we have a huge influx of new users, overwhelming our user support.
I noticed this post, which lead me to think it would be a good idea to link the users from our support page to Stack Exchange:
it would ease the load for our user support
it would move the ...
The way I interpret this closing reason, we do not want questions that ask for an evaluation or comparison of services. Examples for off-topic questions:
What's the best exchange in country foo?
How do you like service ABC?
Is X or Y better for Z?
Is ABC a scam?
Let's collect all XYZ by posting one book/service/course/wallet per answer…
These sort of ...
According to the Help Center:
...and [the question] is not about …
politics or philosophy
a site or software recommendation
I'm not sure but I think these questions may be better suited for Money Stackexchange
Properly tagged questions for specific altcoins are not considered off-topic even if they are unrelated to Bitcoin.
 Question using a specifically-named tag such as "decred", generic "altcoin" or "alternatives" tags.