Just as a perspective thing - DCS just isn't an option for everyone.
Ergodox/dvorak/colemak are all going to have problems / not work with it. DSA or SA r3 are pretty much the best options there.
Personally, I use DSA on everything - I don't really like the extra height of SA, and I have to have a profile capable of doing Dvorak. I am probably not a prospective buyer though, just wanting to point out the benefits of non-DCS.
That's just incorrect. I have seen several ErgoDoxen with DCS profile keycaps on them. You don't need crappy uniform profile keycaps on the ErgoDox or other keyboard, just because you might use a different layout than qwerty. I would think that using "flat" rows, in contrast to "contoured" rows would be the antithesis of ergonomic. A few extra keys in a "Dvorak/Colemak" kit could solve the wrong-row-profile issue. But in order to cater to a vocal minority who are using non-standard layouts or keyboards, the vast majority of buyers in a group buy are forced to submit to their will.
And the poll showing a huge margin in favor of DSA is flawed by a too small sample size. Most people who would be prospective buyers of a group buy set won't bother to vote in the IC, and thus you have the small, but vocal, minority setting the parameters.
Or, people are simply misinformed. They may think that DSA = PBT, which they have heard is better than ABS, so it must be so. For whatever the reason, there exists currently on Geekhack a "group mind" that believes that: 1. Ergo Clears are the only MX switches worth using, 2. PBT is superior in every way to ABS, and 3. DCS profile keycaps are terrible. None of these is true. All these are very subjective, and one can only decide what they like best by actually trying them, and ignoring the current "hype" when making their decision.