You forgot to press X.

The base game is in tier 3...

The only actual expansions are: After Dark, Snowfall, Natural Disasters, Mass Transit, Green Cities, Park Life, Industries and Campus.

The Content Creator Packs are packs of buildings made by content creators from the Workshop. They add buildings and props. Most of these are really good, but they're not vital and they don't add gameplay elements. (Don't be fooled by the 'mixed' reviews on the European Suburbia one, most of those is from people who couldn't figure out how to use it, not about the quality of the pack itself.)

The rest is practically pointless.
8 of those 23 DLC's are radio stations. Literally just ingame music.
The Deluxe Upgrade Pack just adds 5 monuments that don't do anything. (And you can probably get from the Workshop in better quality.)
Concerts is just a handful of buildings, one of which gives you a concert event for the city.

Because it's not on the Steam Store.
It will be highlighted correctly for anyone who owns it and uses RaChart.

Edit:
There are actually 2 apps, one of them is not on the store but the other one is.
app/73185/ and app/73186/

$7.80 (about €7.04) already :(

It started at $6
https://i.imgur.com/RBR6mki.png

$6.98 (6.30 €)

Yes.

Cities in Motion are both good too. They're a lot more constrained than a typical city builder, which makes for a very different game
(basically, the city already exists, and you're just trying to build a public transportation system)

The price that is being shown to you is what matters - if you open the page now and buy it in 2 days, you still have to beat this moment's price.

Hmm, I see you picked two Weaknesses during your character creation phase. The good news is that should give you enough points to pick a great positive trait!

Remember to use your level-up points wisely :)

View attached image.

+1. Even just Prison Architect + DLC is worth for me $1 (and I'm a cheap buyer, as some of you already know).

ROW keys almost always activate in any countries (there are rare exceptions).
The notification appears as such even if you get a ROW key.

Don't always trust what Humble Bundle says, the notification should be taken more like "to the customers from these countries we give locked keys" rather than "your key will not activate in these countries".

Yes, on your purchase page there's the option to increase your amount

+1 going for the DLC too as I got the base games, so I'll do some GA

Cities in motion is good, as long as you know what you're getting yourself into.
It's not a city builder - the city already exists. You need to build a public transportation system in it. The constraints make it a very different experience

I'll just leave this here: Cities: Skylines - Snowfall

+1 It's the same Paradox thing to entice you to have to buy their dlcs. Cities skylines is one title I wouldn't mind an entire HB bundle price for.

Surviving Mars was fine, but I played the whole thing on Xbox Pass on PC and it was too slow for me to recommend. $10 for the complete edition is a good deal though if you really like builders and don't mind it slow.

Yes, you can.