You can check the college’s common data set, section C7, to see if “level of applicant’s interest” is considered. If it is, that suggests that the college is trying to increase its yield by rejecting or waitlisting applicants who do not show additional interest (e.g. having a visit recorded, checking the portal, etc. – or applying ED).
However, it is true that yield protection is blamed too often for rejections from what the applicants thought were safeties, even though there may be other likely reasons for rejection that the applicants did not consider (e.g. applying to an oversubscribed major that is much more selective than the overall campus).
Both UCD and UCR list “level of applicant’s interest” as “not considered”.