E-switch KS1100 switches?

[Hak Foo]

I was looking through electronics suppliers for a small PCB-mounted pushbutton for an unrelated project, and found a listing for E-Switch KS1100 series switches.

https://www.e-switch.com/product-catalog/pushbutton/product-lines/ks1100-series-pushbutton-switch-with-keyboard-functionality#.YVoVGn1lBPY

They clearly look like a MX-clone-- similar shape to a plate-mount MX switch, 50m lifetime rating, but no details on feel or force curve beyond "60gf" and "2mm to make, 4mm to full travel."

They are *unbelievably* cheap at at least one distributor right now-- Newark has a few hundred in stock, at less than 12 cents per switch.
https://www.newark.com/e-switch/ks1100oa1af060/pushbutton-switch-spst-10ma-pc/dp/25AC2375?gclid=CjwKCAjwqeWKBhBFEiwABo_XBvahQ7nQ-tY-Ud2mqKmUM43EcFIl4z0IMDHiCYsRVPgSfS26W0iVGhoCxR8QAvD_BwE&mckv=sfkjvnGZl_dc|pcrid|434136793434|plid||kword||match||slid||product|25AC2375|pgrid|100464451146|ptaid|pla-941372904365|&CMP=KNC-GUSA-GEN-Shopping-NewStructure-Switches-Relays

Has anyone tried them?  Even to the point of asking "tactile, linear, or something else?"  Are they someone else's product rebadged or something unique?