yes, people are always motivated by self interest, even for what seems like altruistic actions the underlying motivation is that it makes them feel good about themselves.
I'm sure there's a name for this but a modern day label could be the "Facebook Syndrome", where seemingly endless goals of altruism is at its core, motivated by self interest and feeling good about oneself, to the detriment of the people you profess to be helping.
I think it's called virtue signaling. and yeah, it's rampant on social media.
possibly or maybe there are actually a emotions called sympathy and empathy.