I can find tons of articles stating otherwise.
And the article you copied does say:
–“Another point to consider is whether double deposits are actually legal, regardless of the reasoning behind committing to two schools during college decision time.”
–“The language on the Common Application’s signature page says that the student agrees only to place one deposit.”
–“It is important to understand that there might be legal ramifications for taking that approach for any reason aside from your student being wait-listed at an institution.”
Debating is not allowed on CC so at this point the OP can research this issue.