I came across an article by accident the other day from that same site on "How many watts do you need in a Bass amp for small gigs". It was one of the most ridiculous pieces of twaddle I've seen in a long time.
Having just now had a quick look at some other articles on the blog on that site and it's either a joke or written by someone with very little knowledge about basses, guitars and amps. It's so bad I really can't tell if it is supposed to be serious or supposed to be a p!ss-take.
Here's the link to the article I saw.