At first I was incredibly skeptical and comically amused by this. The more that I think about it I believe this is Occam's razor for what dark matter is. No other theory seems more plausible than information being a form of matter accounting for all that we cannot see. The sheer vastness of space the sheer distance and time it has been occurring and changing and evolving it's not that far-fetched to believe advanced civilizations that cannot ever reach us have amassed great databases of information. These things require energy and storage the same as anything else. It's been a fun thing to bake my noodle with lately.
futurism.com

Physicist Claims That Information Is a New Form of Matter
"Everyone should find this interesting because the projections show that we are going to produce so much digital content in the near future that the number of bits produced would equal all the atoms on Earth."