She mentioned she didn't call the cops because of Amber's warning about corruption. She specifically set the tweet on a delay in order for her friends to be able to get away before said corrupt cops could be brought it. She planned on being exchanged as a hostage for all the others, as per the deal that was offered her. Seriously, everything you are asking about is right there in the text of the comic.
Mmm... I wouldn't say everything.
The whole police thing is something Amber thinks* might be the case for 'some' of them...
And even SHE says they are on their way (bluffing, sure, But Blaine's reaction as to why that is is because SHE is afraid of her identity being revealed, not that he has nothing to fear from them because of bent cops - which might actually be the case and her reason for suggesting they might be...)
But that shouldn't stop a call that someone is attacking students on camus.. the police would appear in droves, as would the media.
No-one with a scratch on them despite a minimum of 4-5 goons looking to cause damage. (Hmm, SIX according to Joyce during one of the TWO strips of her introspection during this - and even more as Walky says they miscounted when Faz shows up.)
The bad guy's "sudden escape" from being hog tied (with an entire roll of tape) and a hood duct taped around his neck AND Walky sitting on him... but not a word of warning from Walky that he was even trying to escape?
Add in Walky doing bugger all when Dianna Attacks Blaine, and then his sudden cowardice when Joyce attacks Blaine, instead of HELPING either of them.
(Have the goons all run away?)
I was concerned at the start of all this as it seemed WAY too casual.
Then I thought that was the calm before the storm... but no...
And Joyce has "had a panic attack" in between strips seemingly which has allowed Blaine to both grab her AND get through the mob between him and the door- and the mob (let alone Walky) didn't think to rush Blaine while he was being leapt on by neither Dina NOR Joyce? (Hell, even AMBER stays put)
(And this is the same Joyce who is apparently fuelled by RAGE right now - and her sudden supine form is 'explained' in a throwaway line of dialogue next strip??)
I'm usually a HUGE fan of DW's writing, but he seems to be falling into, dare I say it, trope-ism here...
I truly thought he was going for an epic, 'strip-changing', talked about for years, run here (especially given the disclaimer at the beginning.)
But what's actually happened?
Mike's had a fall, but is apparently 'generally' alright.
Toedad is dead, but no-one cares, not even his daughter.
Everyone knows Amber is AmaziGirl... seemingly... but no-one cares.
Minimum of 5 goons, spread across a room, armed with bats, are ALL taken out by AmizBer with no-one else getting a scratch on them or even attempted to be so (despite Joyce nad-shotting one before anything else kicks off).
It all just feels ... empty... and kinda rushed and formulaic.
(to me)
Again - the story isn't quite over yet - so I'm still hoping there's gonna be some kind of larger pay-off.
We still dunno if Ruth is on the way, so.. I dunno maybe more to come?
But if all of this is resolved because of a tweet... well...