This rental can be quite expensive. Changing IP addresses - to avoid being detected as a bot by the targeted website it is often necessary to change IP addresses regularly. This can be done by renting IP addresses from specialized providers. To get large volumes of data the cost of scraping is often higher than using a provider like Infobel Pro to get good data. There is a lot of scrapable and collectable data available on the market.
Scraped data is often of poor quality As explained above scraped data is often incomplete outdated or even wrong and still needs to be enriched afterwards. People who scrap often think they are Whatsapp Mobile Number List saving money but in reality they are wasting time and money by producing poor quality data. In the end they often end up using service providers to get quality data. The legality of scrap data can be questionable For example there is mobility data available in India for the entire world including Belgium that identifies the movements of any device.
However this poses a problem in terms of privacy because even if the data is anonymized there is still the phone ID floating around. If that ID can be associated with a person or a phone number the information is no longer confidential and it is possible to track that person's movements. Compliance with regulations is one of the biggest problems with data scraping. Retrieving data and running a campaign targeting individual profiles is a violation of GDPR even for data that is considered public on LinkedIn.