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.