bear in mind that the linked article expands and clarifies that it doesn't mean banning all ads, it's is talking about banning specifically paid ads (i.e. the advertised thing is spending money to be shown) and/or third-party ads (i.e. the advertised thing being shown in places that don't already refer to them). So word of mouth is fine, a business catalog book is fine, all comparison/customer review/keyword search sites are fine, etc. The one thing I can think about is the smaller companies and businesses finding it much harder to gain traction, but word of mouth would replace advertisements and word of mouth is already quite effective - see the very site we're talking on right now!