This is the problem with big concentration of wealth and power. The big tech mega corps can copy your idea easily because they don’t have any budget, they can undercut you or sell at a loss, and they can distribute it to all their current customers with anti competitive bundling.

It has happened over and over many times and American antitrust law is useless. The largest corporations must be broken up, taxed heavily, and regulated in new ways. Otherwise there is no fair competition or level playing field for startups.