I do spend money on various IaaS offerings. But none of the services on top of that have come up so far as something I feel I need. But I'm doing mostly research (which is also my job) and side projects, not running a tech business. I need servers, not so much services. There are some vaguely relevant services (like machine-learning-as-a-service), but I generally don't feel comfortable being dependent on an external service for my actual research. So I'd only use these if it was an ancillary need and not something where I might need to publish the results. There's also a move towards asking researchers to ship VMs of their test setup as a replicable archive of the work, and dependencies on external services are a no-go for that.
For my personal life, Dropbox is the closest I came to paying for. But then I realized I was mostly just using it to back up photos, which seemed like a use-case it's not even designed for. So I moved those to a local backup + Flickr.