Judging by the rest of the comments in this discussion, there are some very notable oversights missing from this list. It's not unlikely that is caused by a lack of referral program from those providers.
There may be notable services missing, but I wouldn't say it is an oversight. It seems the most popular or well-known services are covered and not all of them have referral links. Sure, there is room for improvement, but it seems to me that the creator put this together in good faith.