The guy has some kind of point (for which he was flamed in the comments, and respect for acknowledging his gratitude to the maintainer) but the maintainer did the work, and by dint of ignoring this guy, did another 15 years of work on WP which has been made available under the gpl for free... that's a win for everyone as far as it goes, right?
If he just gave up in 2010 so there was no "conflict of interest" to satisfy this guy, who is actually better off?
If he just gave up in 2010 so there was no "conflict of interest" to satisfy this guy, who is actually better off?