Hi Yes some of them there are for self employment but you could also used it as way to boost your career.So here why i compare them to mooc :

1:some knowledge proposed on thèses courses can give you better opportunity to developp a skill that will attract employers attention. For exemple thé better sheets would give you more chance to be employed for a data post or crm management post than Excel courses proposed by ivy League university.

2:theses courses are use by self employed People who make a leaving from à very specific skill /expertise, mooc course ar good but more general you couldn't find content like that in them.

3:these courses follow trends, and this is the very important part because with mooc you don't know what is the trend by industry