it amounts to service limit obfuscation, and their market are very clued about that
nobody wants them to add fineprint every time users find effective ways to actually use the service to its advertised limits, it only benefits those who want to be milked for recurring revenue for sporadic usage while paying handsomely for the privilege
being honest would be to just adjust the limits rather than adding piecewise limitations
but of course with honesty comes that people can actually gauge your product accurately and they may not want that