Of course IGN preview'd the game at gamescom, that's their job to preview & review games. What's not their job is to promote the game for Frontier which is why they are denying them a copy.
IGN will buy a copy on release day & review the game, that's not what the issue is. And of course Frontier isn't required to provide free copies but It's common practice to do so. It is
not common practice to tell a publication that they aren't getting a copy because they didn't advertise their game enough. That's actually how Youtube functions. If you start a PlanetZoo channel, constantly broadcast it, build a fanbase & devote many hours of your life to it you will absolutely receive a copy. DeLady, Rudi, Silver, etc. will absolutely have access to the game before release & you'll see them drop videos on release day with new content and their opinions. They even flew a bunch of them out to events over the last few years to promote & advertise their game(s). It looks like Frontier wants to treat publications like IGN in the same kind of way as their Youtubers, where you'll get a review copy
if you give them the amount of exposure they like.
& hey if you're cool with them doing that, cool!

I'm just personally not, I think that's a bad road to go down where unbiased and critical opinion become harder to find. Where you can control who reviews your game on release day and who won't have a review ready for days/week+ after. The whole reason review copies are given out early is so they have enough time to play & review the game for the release date. They clearly don't want IGN to have a review ready for release day.
That's not what he said,
"I do like simulation games. I don’t like this simulation game."
Source: https://twitter.com/DanStapleton/status/1007391950935216128