Companies pay what companies pay for office software. If Adobe can charge more they will. It is a great margin. Selling individual components to the masses at $200 a piece worked well. Selling all 6 pieces for $20 a month will yield $240 a year. Figure that the majority of owners only want one piece, not all 6. So sure they are giving up on $1000 in sales to make $240. In reality they are giving up $400 in sales once every 5 years to get $240 a year. A business will be swayed by the argument that now any user can access all functions.
I came from a corporate culture where IT limited what software was on what PC because of licensing costs. One company I worked at had 2 central PCs with all available tools, that anybody could use, but at their desks was more limited capabilities. Some licences cost $1000 a year, can't give it to everybody, if only used 20 minutes a week.
I think Adobe is doing a good job making money. But I think in the end they will get out of the web business with HTML5 picking up steam.
I think PDF is so easy for other entrants that all they will see is licensing fees from Microsoft as it is built into office.
I think Adobe's only future is graphics and marketing.