It's true that WhatsApp is currently the leader, but I'm wondering how it will work out for them when they start adding ads, as it has been reported they will s

It's true that WhatsApp is currently the leader, but I'm wondering how it will work out for them when they start adding ads, as it has been reported they will some time next year. When there are free alternatives that don't (and assuming e.g. Signal catches up in terms of features and reliability -- big assumption I admit), it's not hard to imagine that at least a few will install these alternatives, and use them in parallel.