Interactive toys, to me, have always been proof of concept for capitalism. Model A uses a toy that encourages members to tip a certain amount, members tip amounts and see instant gratification on both their and the model's part, while Model B pervs her room and sees how much faster A's goals are going than Model B's goals. Assuming all is equal, including camscore and all that jazz, then there would be no reason that Model B would not try out the toy that brought in a faster goal time and shorter shift/more money. More models start seeing the success of the models using the toys, more members start seeing them crop up, and the market that interactive toys is geared towards starts building as the following of users builds. The more something rewards a group, the more that group is going to continue to exhibit the behavior that brought them the rewards they found they liked--both on member and model side.
So, really, yeah, the ones tipping the models with the toys are the ones driving the market. If there were no money to be made in Ohmibod or Lush shows, they wouldn't exist anymore.