Centerstage98,
I think what has happened is that neutral feedback actually now means negative feedback. Language mutates over time. Because 100% positive feedback is so common, anything less than positive is deemed negative. Neutral has ceased to exist. I learned that from the first or second time I left neutral (as a compromise between positive and negative) feedback, naively thinking it actually meant neutral.
The same thing has happened in college grades (my own bailiwick). Pity the naive professor who thinks that A means outstanding and B means good/above average and C means average. Give a student a B and he takes it as average or even failure because almost everyone else gives mostly A's. Give a student a C and she considers it abject failure. You can try to explain that C is satisfactory and B is above average but it cannot be heard. The language has changed.
Stubborn as I am, I persist with the old grading system, explaining what it means when I use it. Students respond by giving me F (negative) feedback on teacher evaluations. I have a thick skin (and I have tenure--for all you who think tenure is evil, consider that it helps keep an old war-horse tough grader like me teaching instead of having been fired years ago).
I console myself by telling myself that I did them a great service by, for once in their coddled little lives, telling them that they are actually in the middle of the pack rather than OUTSTANDING (when everyone is "outstanding" it is impossible to identify the truly outstanding among all the "outstanding ones"; when everyone is outstanding, outstanding means nothing). That gives them the chance to improve, whereas if they are told they are outstanding when they are not they'll never know the truth and lose their chance to learn and improve.
But they don't/won't buy it. The language (coinage, lingua franca) has changed. Everyone is now above average, outstanding. Businesses know that A grades are now meaningless, so they figure out other ways to get a true assessment. I warn the students but they don't listen and will have to learn the hard way when they go job hunting whether they are truly outstanding or merely average.
To apply all this to
ebay and Yelp and all the other feedback systems: on
ebay, nearly everyone is 100% positive. 99.5% actually means okay, pretty good--even the best
ebay seller with any volume of sales over several years' time can have been the victim of a few cranks and jerks. But when I see 98% positive, I read that as a red flag.
Notice what's happened? 100% no longer signifies true 100%. 98% is relatively uncommon and signifies D or F. I don't recall ever seeing anything below 98 or 97% positive. Have you? The range has shrunk to 3 percentage points, actually, the practical range you'll see is more like 98.5 to 100.
So we all have developed other ways of assessing
ebay sellers--mostly trial and error or recommendations from other people. Over time we find the sellers we know to be knowledgeable and trustworthy and stick with them.