I mean what else should they have done? No matter what he would have never finished higher than 3rd after he screwed up the start and got gapped after the first stint, so might as well try to win the race with his help.
If Bottas would be quick enough none of this would happen. And if he tries to play mind games as some suggest he will also not succeed. Hamilton isnt taking him serious as a competitor, Max is his rival. And if Bottas is trying to rock the boat I'm sure Toto wouldnt think twice to get somebody else (Hulkenberg?) into the car, since this year they can't afford a intra-team rivalry when they dont have the quickest car anymore.
Having said that, I doubt that anything is going on. Bottas has tried for a while to get away from his "lap dog" image with beard look, profanity radio messages, often blaming other factors on bad results (which he never did before 2019) or having the girlfriend complain about the set up to the press and throwing digs on Social Media on his team mate. Simply not enough.