I’ve been fortunate enough to work at an institution that recognizes expertise whether developed in structured learning or open learning – or perhaps “understands expertise” might be the better term since the word “recognizes” implies it fits into a policy. My connectivist engagement resulted in being able to do helpful things for coworkers, and supervisors started sending me to cool PD events “because you are probably the only one interested.” That led to projects and working groups, all without earning quantifiable credentials but gaining what you call “social capital” in the college. (You were one of the *digital* social capital rock stars, and I was privileged to hang around the edges of that digital world. But it made me an innovation leader in our small institution.) It also made my work very satisfying.
In larger institutions, promotion and salary increases (not what I was seeking) probably would not follow, so, to answer your question, yes; informal learning that results in increased capability should get some kind of formal recognition, badges or micro credentials or staff awards, that count toward promotion and even tenure. I think that is a possibility being entertained in the British Columbia (Canada) open ed community.