The immediately following text in the CL ToS reads:
As a limited exception, general purpose Internet search engines and noncommercial public archives will be entitled to access craigslist without individual written agreements executed with CL that specifically authorize an exception to this prohibition if, in all cases and individual instances: (a) they provide a direct hyperlink to the relevant craigslist website, service, forum or content; (b) they access craigslist from a stable IP address using an easily identifiable agent; and (c) they comply with CL's robots.txt file ...
As a limited exception, general purpose Internet search engines and noncommercial public archives will be entitled to access craigslist without individual written agreements executed with CL that specifically authorize an exception to this prohibition if, in all cases and individual instances: (a) they provide a direct hyperlink to the relevant craigslist website, service, forum or content; (b) they access craigslist from a stable IP address using an easily identifiable agent; and (c) they comply with CL's robots.txt file ...