Outside of its “one-shot” gameplay mechanics, Elusive Targets have a very specific purpose from a business perspective: entice players to keep the game installed and keep playing. And of course, you’ll need a reward, which are in the form of the ET suits.
The obvious side effects are two-fold: early adopters are rewarded, and those who later pick up the game later (due to a sale or whatever), miss out on this aspect of the game. Of course, the pain of the latter is felt more by those with OCD and/or completionist tendencies.
Who knows, maybe one day when IOI stops releasing new content for Hitman 2, they’ll put the ET schedule on a permanent loop? One can hope, right?
At the end of the day, I’m just glad IOI hasn’t resorted to microtransactions to keep the series profitable. This is something they don’t get enough credit for, IMO.