I had a drinkmate, it was pretty good it can tolerate flavours before carbonating unlike sodastream, and its not zionist as far as i know. but when you factor in the cost of the bottles (which expire) its not much of a saver vs cans but it is a lot less waste. Another expense is having a connector that is sodastream compatible, those are much more expensive than the ones you can get with standard connectors. I have heard you can 3d print or buy an adapter (just make sure to use food safe materials).
I eventually paid a lot for a grohe under the sink carbinator, I like it its great, much higher carbonation and also refrigerates the water, but it is extremely overpriced ( it has expensive proprietary filters, but they last a really long time) but if i were to do it again I would diy it, since you are considering it i highly recommend it.
I think she is refering to the enclosure movement, a proto-capitalist strategy to privatize public land. Karl Marx talks about it a lot as a way for capitalism to take root in a society. https://en.wikipedia.org/wiki/Enclosure
They are suggesting that ai is a way for private interests to control foss.