1) i think this can be effective but it hasn't gone live, it is just a very early stage. so if there is an effect it would be tiny at this point.
2) i totally agree with this, with openBazaar growing there will be a lot of good things happening with bitcoin
3) steam accepting bitcoin is not official, and it came out 1-2 months ago and not yet started.
EDIT: they still don't accept bitcoin but apparently they are officially doing the groundwork. ref: https://redd.it/4fuk6c

+
4) with ETH dying slowly, the money is coming back to bitcoin. this is biggest IMO
5) there is always halving effect