The service you choose to converse with again will be, all else equal, the one that "got you" and told you you were smart / funny / attractive.
Because you have a choice of who and what to continue using, and all else equal the ones that see your value are ones you'll want to engage with.
The larger the set of options, the more this will dominate.
Before most of us only had a few friends to pick from
But now we can spin up new infinitely "devoted" friends on demand.
Selecting for engagement, even if the user doesn't want it.
Engagement is necessary for retention, which is necessary for the business model.