You are allowed to:

Make a review of the modpack,

Post a download link to this page, but not claiming it as your own.

Use some of the mods in your own modpack(please contact the original mod authors before doing this)

You are not allowed to:

Claim this modpack as your own.

Post download links to other websites that aren't curseforge or this homepage.

Note: I haven't created any of these mods myself, all thanks go to the original mod authors.