MEGA is definitely not BPS. If you look at their website you will see that they say it is a biological study and that "the MEGA consortium has brought together many experts from a wide range of different disciplines across genetics, genomics, metabolomics, pain research, proteomics, psychiatry, sleep research and transcriptomics." I think it has huge potential to help M.E. patients.
They say.
Looking at the plans they have disclosed, the two concrete things they want to do are 1) establishing a biobank (a place where blood samples and patient data is stored), which is a waste of resources because there already exists a good one, and 2) having patients fill out symptom questionnaires. These questionnaires include data on depression, anxiety, PEM, fatigue, etc. They have refused to clarify what they even mean with PEM and it could be a distorted definition. The fatigue, anxiety, depression questionnaires are perfect for the BPS crew and they will use them to further their agenda.
They had planned to apply for funding for the biomedical studies later. There is no guarantee that any biomedical research proposals will be accepted. We don't know any details about these future biomedical studies. They could be of little value. For all we know, MEGA could just be a trojan horse for Crawley to get 10000 fatigue/anxiety/depression questionnaires filled out, while the biomedical studies based on the MEGA biobank end up being overambitious and never funded, or lacking depth due to funding limitations, or suffering from other problem. A major concern is that Crawley could introduce a misleading definition of PEM which would obscure real PEM and falsely attribute PEM to people that don't have it, creating confusion. It seems unlikely Crawley would truly acknowledge PEM because it means accepting that exertion objectively increases impairment while she has built a career on the idea that patients can reduce impairment with exercise. If MEGA went ahead, I would expect it to define PEM so that it doesn't conflict with GET.
We patients deserve better. There is no good reason why MEGA should suffer from any of these problems. Good research advances knowledge, bad research misleads and prevents progress. I think we're better off waiting for a better project of this type to support.