If they do not carry thick diapers and proper full-cut rubber panties, then they have not empbraced it fully. These were still the predominant mode of ABDL dress when the term was created by DPF and AB was the overwhelming bulk of the membership. This was because, 18 years earlier, when the youngest legal members were born was 1967 or so, well before paper diapers had become a thing. This is what the bulk of DPF members had worn as babies and children. Even at that, there were very few members under 20. Even in the 1970's plastic panties were still widelyavailable and used. Empire were still being sold in the middle '80's along with others, I saw a pair of pink panties with a print of indigo flowers in about 1985 and Adams Drug and Brooks, now part of Walgreen's, were selling Babymate panties in both smooth and grainy material in 1984 in Providence, RI. In '88 and beyond, the companies that sold throw-aways for babies recommended wetproof panties be used over their product and so did at least one Home Economics social worker that I met
There may also be insurance and tax consequences. A. C. Medical only acknowledged their "other" amrket in provate correspondence with trusted customers because to do so openly would result in losing a ta-exempt and reduced shipping fee status in Canada