This is false. The difference between 20 people speaking up versus 200 or 2,000 is huge, especially if they are saying the same thing. If they don't want that thread being spammed then they should reverse the decision to remove the feature .
Only, If the Bug tracker would be the only source of feedback. But it isn't. It's not even meant to be a source of feedback, but a place to report technical bugs.
And if you have some people giving feedback over the bug tracker and many many more giving feedback over other channels (like HN, Twitter, etc.) then there is very little value in any [EDIT: spamming] additional feedback [EDIT: which doesn't add anything to the discussion]. And yes it would not matter if 20 or 200 people comment with "me too" in the bug tracker if they already got much feedback from other sources.
Also spamming a BUG tracker because you don't like something which is not a bug is never going to change anything and just not helpful for anyone at all. It's like a "soft"/"harmless" DOS attack on the issue of the bug tracker preventing any proper discussion, i.e. not helpful at all.
As you quoted they are well aware of the feedback, given that it makes little sense to spam the bug tracker anymore (at this point in time) as this wouldn't add any value for anyone. It wouldn't make them aware of the feed back (they already are) nor does it add anything constructive.
Or in other words, your opinion is already fully expressed through other people. (If you planed to only comment "me too" or similar.)