Now image the situation where the popularity of the #FOSS project grew unnoticed, and the expectation of "hobby project" was never well conveyed.
Even the maintainer at this point considers the project "more than hobby". They want to keep working in the way that motivated them to start, despite people demanding differently. They still want #JoyOfCoding and to build what they want, thus decide to retain full control of contributions.
The label #BDFL is slammed broadly about in harsh criticism.