The author of the original article is one Andrey Karpov. The Medium article is posted by someone called Sergey Vasiliev Marina Makarova and Andrey Karpov recommend". I guess it's the same Andrey Karpov in both cases, especially as hovering over the name Andrey Karpov on the Medium article indicates that his username is "Code_Analysis" and the original article was posted on the blog of a static-code-analysis company.

Seems legit unless someone's actually impersonating someone else. I don't quite understand why, if Karpov wrote the original article and is a Medium contributor, Vasiliev rather than Karpov should be doing the reposting. (You could imagine something like this: K is a senior technical guy at PVS-Studio, V is a more junior technical guy or is in the marketing department; in 2009 they thought it better to post things under K's name to get it out there, but now K wants only the more impressive articles under his name and lets V post the others. But this doesn't feel terribly plausible.)

OMG! It is a great conspiracy theory! Everything is clear. Much time has elapsed since then, many people didn't read old articles about 64-bit. But these articles are useful and as we can see attract interest. Plus, the audience has changed. We would like to share with new one a good material. It is impossible to share old link that is why we decided republish some good articles in new places. This information will be interesting for recruits.