Slipstream adds a cost

they wouldn’t need slipstream if filters on our nodes didn’t work. they do indeed work. just like your water filter doesn’t catch every single impurity — and i can grab a handful of dirt and put it directly into your water supply. slip stream is me taking a handful of dirt and putting into your water and telling you your water filter doesn’t work. nonsense.

I thought about it several times, and it still makes sense. Forcing spammers to use slipstream is what "working" looks like.

Down the drain of retardation