I can’t speak to the “every day” thing but the example you gave is of one that *expired* (very different from canceling) and was subsequently re-listed. It happens because a listing agreement legally has to include an expiration date. Sometimes a seller will modify the listing agreement (to extend the time frame) and sometimes not. When a listing contract expires and a new listing is inked, those are legally required to be indicated as 2 independent listings. This would also apply if the seller hired a different agent. The change in parties to the contract means a new contract and thus a new listing.
In the case of this specific property, there was also a duplicate canceled listing for the same days as the current one. That is likely due to accidental user entry (Realtors accidentally hitting “submit” twice), or due to Sandicor’s servers erring.
Its not as though she is canceling and re-listing every 60 or 90 days to make the property appear to have activity. The property expired once after 3.5 months and again after another 7 months.
However, it would make more sense to just re-list the property at a reasonable price. Over the course of 10 months(and 3 listings), this property has come down in price only 4 percent.