Define "success".
If you mean "more people get a diploma", probably.
But that's mainly because the requirements of many "online colleges" are far lower in order to atract as many suckers as they can to spend a lot of money on what's basically nothing at all.
Sign up, take some nonsense "personality test" that has nothing to do with the subject your degree will say you studied for, pay a lot of money, and get a diploma stating you now hold a PhD in nuclear physics, another one in pshychology, and a third in software engineering, complete with fake lists of exam grades and a bogus yearbook.

Far easier than going to university for a decade to get the same degrees, doing a lot of hard study and research, working night and day to prepare for exams, etc. etc.

If however you define success as gaining actual knowledge, they usually suck.