No.

The Deluxe Edition:
Included in the Deluxe Edition are 5 In-game historical monuments from around the world, the games original soundtrack as well as a digital art book.
Five in-game items include:

Statue of Liberty
Eiffel Tower
Brandenburg Gate
Arc de Triomphe
Grand central terminal

There's also preorder content and free-launch-promo content.

Sure, there are some DLCs for Cities: Skylines, but there are a lot more for Train Simulator. :)

Maybe it's because Train Simulator.

A mixed game (63%) in BTA...

Simple planes and Plague Inc. were in HBM June/July

is there a difference between android and PC versions? I played it on my tablet and it was really cool for a while, then it got a bit more boring. Carrying over my best survivors, individual maps barely needed strategies just a similarish approach... Maybe I just wanted more from it.. though the events, treating the individuals and such is really well done, it's a better game than Rebuild 2 was.

Perhaps it is SG's referral code from:
https://www.steamgifts.com/account/settings/referrals

"Currently, we have partnerships with the following sites, and if you allow us to do so, we will update their links to include our referral code: Fanatical.com, HumbleBundle.com, GamersGate.com."

Yay, I'm not alone! :-)

By adding it, you'll unlock some free stuff.

Nothing will be added. This is it. It always clearly tells you right on the page if more is to be added. No ambiguity.

And actually, it hasn't been "as usual" for a long time. The majority of their bundles no longer have 2nd week additions. They haven't for over a year.

Totally worth it imho, you´ll have spent days playing before you notice that you want even more micro management! Things like natural disasters or snowfall would freak me out rather than adding to my city building experience, i´ll keep those DLC for after i actually kinda beat the game to wreak havoc in my then sprawling metropolis! =D