Nexus Mods uses a Content Delivery Network (CDN). Sometimes, the speed limit is applied only to the main download server. You can attempt to force-download via a different CDN node.
This is the secret the modding veterans use. You aren't bypassing the speed directly; you are bypassing the install friction . nexus download speed bypass install
Now go install that 4K texture pack. Your patience (and $2) has finally paid off. This article is for educational purposes regarding legitimate use of Nexus Mods API and Premium features. Bypassing paywalls via hacking is a violation of Nexus Mods Terms of Service and may result in a permanent IP ban. The "API bypass" via mod managers works within official rate limits. Always support mod authors. Nexus Mods uses a Content Delivery Network (CDN)