Hello,
I had a couple fast buds autos turn out this way, and by the end they were only about a foot tall and had a sprinkle of popcorn buds. If you have a limited space and don't want to waste time/water/nutrients on them then I'd pull em and start fresh. Because they most likely won't pull through fast enough to reward you with much...if it were photoperiod strains that might be different.
Goodluck ✌️