[bdamm]

What happens when a business makes a bad choice and people "unlike" en-masse? Does the counter go backwards?

Probably this has not happened much, but I do "unlike" businesses when they start to get quite spammy.

[awy]

I'm pretty sure those flip things don't like to go backwards. So I'd assume an unlike would just freeze the number and absorb the next like.

[joezydeco]

The digits can spin independently. The computer driving the display can go "backwards" by just advancing the digits until the correct one is shown.