Twitter @jackhole is doing it en masse as well, just ask KitJ!
When I’m not shadowbanned, I average about 1-2,000 impressions per tweet.
The shadowban has lasted about a day each time. I can get 6 or so tweets out, then wham!
When shadowbanned, I average 20-30 impressions per tweet. I gotta hand it to @jackwipe, it is very effective for stifling free expression.
To see if your account is shadowbanned, go to shadowban.eu and fill in your handle.