Complex sentence: The petition gained over 500,000 signatures within 24 hours, making it the fastest growing petition to date for the site, while having the servers at Change.org in the UK regularly become unresponsive due to the high demand.
Split into simpler sentences: The petition gained over 500,000 signatures within 24 hours, making it the fastest growing petition to date for the site. The servers at Change.org in the UK regularly became unresponsive due to the high demand.