ACOM is a paid subscription site with searchable databases available to subscribers for research based on their level of membership. They may also build trees and designate those as Public, Private But Searchable, or Private. There are also paid subscribers who may not have a tree in any category on ACOM. Those subscribers avail themselves of all databases available at their level of membership. But, ACOM also provides free memberships to those who want to build a tree, avail themselves of limited access to databases, but benefit from using Member Boards for communications and queries. None of these membership subscriptions is conditional on having a tree online on the ACOM website. Nor is there an ACOM requirement that every member must provide access to their trees, whether Public or Private. The exception to the rule is that Public tree owners, by making their trees Public, have agreed that any member may view their trees at will. The exception being that information on living persons will be shielded from public view by ACOM. On the other hand, Private trees are, by their very designation, private and viewing is by invitation only. There is no requirement for Private trees to be available to others at will for any reason. The privacy designation is like the lock on one's front door; it is meant to keep folks out who have no right to enter.
As far as DNA testing goes, one pays for the test results, takes their chances on finding matches, and then on finding folks who can possibly provide information to prove the accuracy of the matches based on their own research. And therein lies the dilemma faced by some of the previous posters to this thread. They are stymied by supposed brick walls that are seemingly impenetrable.
May I suggest and recommend that those who have invested in DNA testing through ACOM, may want to approach ACOM with their dilemma. Those persons should seek relief in the form of a centralized ACOM database where they may post their data, exchange information, and communicate with like researchers to achieve their goals. They may want to form a committee or oversight group to help determine how and what DNA information may be accessed, by whom, how often, and how privacy issues will be safeguarded.
Because someone may have a problem isn't reason to cause others a problem. Think outside the box and help resolve the issue for yourselves. No member "owes" another member anything. We all pay to use the web site for our own research, and not that of others. Our time may be very limited and we have the right to use it for our own projects. Sharing is encouraged, but is by no means mandatory!
When one has hit a brick wall, one may welcome a break and then offer some time to help someone else. That sharing may be of benefit to both the giver and the recipient. One may feel personally refreshed by having researched something a bit different, and happy to have helped someone else over a hurdle. One can then return to one's own project with a clearer mind, the ability to see one's own research from a different perspective, and have new ideas to address a brick wall. It can be a win-win for everyone.