speaking from experience (https://github.com/bryanbrannigan/pastebin-parser) if you are just grabbing the pastes from the "latest" box you are missing a lot. To grab everything we actually had to create a distributed setup or else pastebin would start banning our IPs.
I ran into that issue myself. Pastebin throttling is real. I was playing around with the idea of actually using the socks5 proxies gathered through scraping in order to retain modularity (and eliminate the necessity of multi-IP set ups which could easily get pricey).
It would be tough because I would have to check the health of each proxy prior to use (so that I don't miss out on request windows), but still an interesting concept to consider.
https://canary.pw
New version is coming out this week that lets you search via relation.