found this. I think pcloud is considered a “good” provider, but I have no experience myself

https://landing.pcloud.com/BlackFriday-2023?name=&channelid=4338&label=BF2023

S3 Deep Glacier Archive has an offer for $0.99 per TB per Month. And If you join Google Cloud Innovators Plus for $299 they give you up to $1000 of Cloud credits you can use for Cloud Storage.

also icedrive

https://icedrive.net/offers/black-friday-cyber-weekend-2023

​

also idrive (backup only, not e2).
https://www.idrive.com/idrive/signup/el/techradar95?subtag=trdpro-us-1371694436494858000

I have only seen the 2 that we should all know to avoid (been discussed here before)
Prismdrive and Degoo.

Both are pretty close to worthless because of slowness, access method, or TOU restrictions.