To be fair, a lot of web forums have run on free software. Centralization was what happened when usenet was over run with spam. Laziness is a poor explanation g

To be fair, a lot of web forums have run on free software. Centralization was what happened when usenet was over run with spam. Laziness is a poor explanation given one alternative exists and requires no maintenance, and the other takes a great deal of time, effort, and especially in the past, a lot of money to run.