Chart shows the probability of hitting a spinner if they have been facing only X direction since they were first seen, as if they were a stander. Example (Ivan UP): https://www.twitch.tv/videos/219993556?t=37m12s

				Up		Left	Down	Right				
Ivan*			10.7	10.7	20.2	--		
Irwin			14.3	--		7.4		7.4
Greg			9.6		9.6		18.7	--
Dana			9.6		9.6		--		18.7
Grunt 6			22.2	22.2	40.9	--
Heidi			27.0	--		13.9	13.9
Tom				14.3	--		7.4		7.4

*Ivan's numbers are not entirely accurate (but close) because they assume his probability of hitting you on the second tile is independent of his probability of hitting you on the first tile. This is not true, as some second-tile hits would also have him hitting you on the first tile.

Conclusion: In the table above, repausing should be worth it whenever the odds are higher than 11%. This is not a hard-and-fast rule, as some spinners are more dangerous than others, but it can be followed for these particular spinners.

Sources:
https://pastebin.com/tZpZHSvG
https://pastebin.com/AKvkBxEe