Deis gave sponsorship money to Jeff Lindsay at some point to work on things that benefitted the docker paas ecosystem - think registrator or herokuish. At no point did any entity named "Dokku" get any money out of this, and Deis being acquired has no bearing on the project whatsoever.

We do, however, wish them luck and are happy to see them succeed.

- Source: I am one of the primary Dokku maintainers.