A few houses around here have 3 phase services, put in 20 or more years ago. As far as I know the power companies do not offer a three phase residential service. The only advantage I see is for HVAC, but at least around here all the AC equipment suppliers only offer a 1 year warranty on commercial(three phase) units, while a 10 or more year warranty on residential units. That is on the compressor of course.
Life is tough, Life is tougher when you are stupid
There is one house in all the towns I inspect that has 3 phase and it was a very old install. The gentleman used to have a small machine shop in his basement. If he took it out now, he would never get it back though. I also believe it was a delta hook up. Not sure, I haven't been in it for nearly 10 years.
Years back I did a resi with 600 amp, 120/208, 3 phase. It was a mansion back then, not Mc; 3 phase loads were AC, and pool pumps. Yes, the POCO had a $$$ for the install and the monthly fees were high, but the owner did not care.
The big issue was 'does the conduit come in any clors, along with the 'big gray box' (CT cabinet)???
THere is one resi in the Twp I work in that has OLD 3 phase, delta, for an extinct machine shop.
I clicked on the 'DexKnows' logo at the top of the page, and then on 'About Us'.
Dex One advertises their services as: "At Dex One®, we offer online and print advertising opportunities"....."We want to help you reach, win, and keep local customers wherever, whenever, and however they look for a business like yours."
So it's an advertising company. And probably not a very good one, at that.