Selling a unit as something that it's not.

A unit that rpi themselves sold with 8g is different than a unit that someone else modified. The reworked unit is not sold with the disclosure that it has been hacked and no longer covered by any warranty, and the memory installed is of totally unknown provenance and quality, timing specs, failed qa, etc. Even the simple process of heating everything up to desolder & resolder temps is not free, it degrades everything, the pcb itself, the epoxy holding the traces and pads down, and all the components, and means higher chance of some failure happening sooner than it would have. But it's sold as a real rpi unit for real rpi price or a little less to beat real ones.

That is the fraud they speak of.

You should be free to do this to your unit if you like of course, and rpi has infinite other possible ways they could have chosen to address the problem and didn't have to do it this way. I'm only saying there is actually a problem.