Actually, compared to the late 80's/early 90's, (before the internet age) sponsors where much more prevalent throughout the parks imo. The internet has made it so that you don't need to put your name on something inside of a theme park..
Unfortunately, a similar correlation can be made between the ambition and upkeep of attractions between that period and the present. It seems Disney is only interested in investing in maintenance that impacts the guest experience and redevelopment of existing attractions when a sponsor makes it a condition of their name being attached to it.
Test Track sponsorship shifted from GM to Chevy - major overhaul. Spaceship Earth went from absent sponsor to Siemens - costly enhancements made. What about Imagination, Universe of Energy and
Living Seas Finding Nemo*? Umm.. yeah. I have to think if France had a current sponsor, there
'd be a movie showcasing people who
probably haven't dropped dead from old age. Don't get me wrong. I like the France movie but my opinion of European fashion and hair styles are probably decades off as a result of watching so many times over the course of my life.
While it may sound incredibly cynical to say, I think today, sponsorships are a great thing, maybe not for enhancements or improvements we would like to see to things but at least as a way to ensure that Disney will continue to maintain sponsored attractions at at least their current level. It gives them a corporate partner they are accountable to and having your name over the door to an attraction in disrepair isn't something most companies are willing to tolerate when they are paying to have their name there.
Anything that improves as a result of a corporate sponsorship being added to an attraction should, I think, be considered an unexpected surprise, these days. Maybe it's a sad shift of my expectations from Disney but I'm
actually okay with that.
*To be fair, maintaining this pavilion has to be costly to Disney and they did invest in lengthening the track and adding the clam-shell cars but the actual ride is a pretty big let-down, evidenced by the staggering lack of line and huge empty queue you have to wind through to get to the boarding area.