If no one is reading your thread, why should we let you update it? Sounds harsh, I know, but if no one is taking an interest afte you've posted 6 times there, then I think you should realize that adding in new updates won't do anything to gain you popularity. Make your updates far less frequent, and bigger so they're more exciting.
Your argument makes no sense.
The number of responses isn't at all directly proportional to the number of readers. A responder must be a reader, but a reader usually isn't (and statistically isn't) usually a responder. Additionally, news posts don't always warrant a response.
Finally, that isn't the main motivation of a development blog (discussion)
My thread has been read ~600 times, and has been responded to 0 times. The services are delegated across various web-platforms as well. Hence, attempting to relate replies to reads doesn't make much sense at all.
My blog posts on game jolt usually have an average of 16 reads per blog entry, and no response. Noting the only way to discover one-another is by finding one and reading the others. Just because a user does not engage in a conversation with you doesn't mean they aren't interested in what you've posted. This model is well adopted in virtually every website that posts news\updates\etc...
This thread has 80 views, and 6 responding posts. Will those viewers likely return regardless to their participation in the discussion? Likely.
Do you respond to most of the threads you read? Probably not.