There are plenty of examples of companies that have plans to purposefully deceive their customers...
Examples:
Cigarette companies for years advertised with knowledge that their products were dangerous to consumers.
Reddit created fake accounts and filled the site with their own content to shape how Reddit would evolve. They deceived their consumers into thinking the content was created by real people - but it was fake.
Dating site Tinder created fake accounts to increase user demand and increase the total number of accounts they had. Some of these fake accounts even responded to members who thought they were talking to real people.
Glide, spammed their users' contacts in their address books with text messages without telling them to trick your friends into downloading their app.
LinkedIn tricks you into importing and inviting contacts to join their platform.
Oracle renamed their first software release "Version 2" because customers were more likely to buy a "polished" product.
The Path app texts your whole address book at 6am without your permission.
So - could Disney have a plan in place to drive up revenue on
Genie+ by making the standby lines longer? I somehow doubt that they really thought it through that much. But I could certainly see them using Genie+ to help maintain a certain level of standby wait time to make the park appear busier than it really is. They used to do that with Fastpass+ so they definitely can and probably will do it with Genie+. There are also rumblings of them doing this with Park Pass to artificially control which types of guests get into the park - so on busier days, Ticket holders and resort guests may get more park passes while APs get less, and on less busy days, APs will get more. We've seen evidence of this where Park Pass availability for APs suddenly increases a week or two out.