John, I don't know if there is a limit to number of rows/columns in a wiki table, but would expect that there is. The biography space on WikiTree's page is limited and more columns than can fit in that width would not be displayed in a meaningful way.
Your other example, using a google table linked from the free space page, is beautifully done and the way I would recommend that you do this. To just list the names (as links to their profiles) on the space page doesn't require a table.