It makes buisness sense to make Facebook and Instagram available to more platforms.
Because you can’t target them with ads as efficently if they can’t keep using your service on a pc.
Why would Zuck throw away an opertunuty to squeeze some more bucks.
I don’t block many people except for certain circumstances.
Somethings I might block people for specifically may include:
How kindly they vocally talk about minority people.
Do they they post about certain embarassing things.
Do they post illegal images or content?
Therew others so the reasons are not exclusive to this.