What I envision is ability for ATOM holders to stake their atoms on multiple chains among different buckets of tokens and claiming multiple of revenues from multiple chains at the same time. I guarantee that this will be a case as @zaki suggests (with a small modification that you can also stake other assets), because am aware of existing projects that are working to ensure exactly that.
Regarding incubation and funding we will see more and more projects doing multiple variations of “Virtual Mining” as it was successfully presented by the ChainX projects.
Ergo whether or not hub tx’es will be high or low will remain speculative.