Additionally, the data is self-reported surveys with questions like "Have you ever been contacted by someone from a company or corporation?" and... yeah? This part shouldn't be surprising to any platform that allows private messages. And "Have you ever seen someone promoting a product?" and most people are going to either shrug or already have a strong opinion, it's not very scientific for actual data on the actual traffic from bots and corporate shills, more how the human users feel about the platform.
I would much rather see an independent investigation from a technical point-of-view, which tracks the comments and timing of user comments to determine how many are actually bots just quietly gaining karma with innocuous comments, or how many are just programmed to go to certain subreddits at certain times to push a narrative.