The checker maps are not to my knowledge only for paying member.
It is the auto runned in the background that is. But the result of manual test is also displayed on the maps.
Result runned by another user with your nic is likely also added there
The system don care how it is runned only that it is.
I guess/home there is a special case for if runned by a basic gc.com member because checker that use coordinates don't get them if used by the on any nic
I suspect that problem that is solved for paying members will not be solved for non paying members. The is a reason for different features and the website need income to exist