I also get how many might not like some kind of membership fee for use....but as the sole financier of my own solar site @8800 ft in a remote area of New Mexico to help some 100+ families who have no cell service or other means of communication I didn't feel bad at all about asking for an annual donation that worked out about 9-12$\month....I have some $13K of my own in this site & must maintain batteries & all site maint on my own....Most who ask for some fee I will say are most likely just trying to cover their installation\operational costs....for the few who might be doing it for a profit motive...well I will leave judgment on that to others although I personally do not agree with trying to operate as a for-profit enterprise...so I practice what I preach..& "donations" to me for my site use are optional, not mandatory. And even like this nearly all who use it have tried to donate something to help so I still have some faith in human nature