Dec 2013, so basically 2014. The SD 410 is not a bad processor and I prefer MSM processor to MTK ones due to the GPU and image processing tech.
I would not user the words "poor people". Emerging markets covers it better.
Point of correction, only Nexus devices received updates directly from Google. Android One on the other hand, received software support from the OEMs for two years, a guarantee an OEM had to give before getting the license to brand a device Android One.
Pixel is created by Google, so of course they get software support.