This is going to be program, specialty, and individual applicant stats dependent. You might be “more likely” to get an interview at a program you’ve signaled, but that doesn’t mean you definitely will. If 90% of applicants send a signal to XYZ top program, the program will not be able to interview every single applicant in that scenario.
But other programs might not get as many signals, and will need to interview applicants who did not signal them.