Not trying to discredit your evidence, but according to the GT OMSCS website, there have been 8664 students in that program. 20/8664 is less than .25%. Anyways, all I'm saying is that I'm confident that Online MSCS are not held to the same pedigree or difficulty as their on campus counterparts.
Being in one of these programs myself I can assure you that the standard is rigorous. I attended a top university in the UK and the quality of education is not any lower.
There are some universities that are absolutely frauds but that is not the case for the universities listed above.
If you disagree go on the coursework pages and try and do the first problem set then tell me it’s not as difficult.