Doesn't that page says that they set up the modules for you? And even if not included in the service, they offer per-hour support: https://www.webarchitects.coop/support
Customer service / tech support can indeed be very costly, not only in time/money, but emotionally!
In my experience while there's some people I am very happy to freely gift my assistance to, most other cases I find very draining to deal with (no matter if they're paying or not)... Maybe I'm just not well suited for this kind of work, but I get the impression that society has taught most of us to be entitled and demanding (and often rude) towards service providers, which makes sense as a reaction to capitalist/exploitative companies (though shouldn't excuse mistreating their workers) but in the case of technology seems to encourage the infantilisation of "users", and in the case of indie or co-op services can be very discouraging. </rant>