Provisioning of new Spaces was recently disabled in some regions while they add capacity. Vaguely concerning IMO and has caused me to seriously reconsider using DO Spaces for a new product I'm building.
I do know that they have limited the creation and looking at the docs for limitation, it seems like they have a 750 requests per second limit per space, which might not scale well. My idea was to create multiple spaces to distribute a load, e.g. sharding per customer, but if the availability is not that good, I might have to re-consider our choice.
The main reason we wanted to work with DO is that the egress traffic cost is reasonable, unlike AWS or Google Cloud where it is questionably high.
It was that bad 2 years ago, in the AMS3 region. I don't know how it is these days, but I expect after 2 years it has matured at least a little bit. They also now include a CDN, which might improve things a bit if it reduces the load on the buckets behind it.
Honestly it soured my opinion on DO a bit. I'd previously had a droplet there for several years, which never seemed to experience any issues at all.
I tried it for a small personal project, just for somewhere to put some small images. On pages of about 30 images, usually one of them just wouldn't load. It didn't look reliable to me either.