If you have to ask, then it shouldn't matter to you.
...........and people keep feeding the troll........
What's the issue with those? Aside from being used on cheap cues, what are their flaws/drawbacks?
This sums up the entire thread.
However, to answer your question; Screw on tips are garbage. They are only on cheap end cues. When I say cheap, I mean $10 USD. If you are buying a cue over $10 USD with a screw on tip, you are wasting the extra cash for nothing. Buy a Szamboti and put a screw on tip on it and you immediately ruined and otherwise great cue.
$20 Viper cues from a sporting goods store at least have a leather glued on tip.
I'll buy any cue's with screw on tips for $10.00
This reminds me of when I was on an aquarium form and a guy was asking where he could get a whale to put in his aquarium in his bedroom.
What's the issue with those? Aside from being used on cheap cues, what are their flaws/drawbacks?