Fed up with unscrupulous people using Whatsapp to spam.
To top it off, it was sent on Sunday early morning, hardly the time when people are receptive to this invasion of privacy.
These people may be ignorant that spam is wrong in all ways.
Or they thought its the easiest & cheapest way to market.
Marketing is more effective with permission, and definitely better when there is a relationship later on.
Business owners, however tempting it may be, don’t spam. It just reflects badly on your business.