Personally, I don't really get permission based advertising as it defuses the purpose of advertising and you will end up with clever people who just watch ads to get paid. It's better than getting bombarded with advertisement that you didn't even sign up for but isn't that the whole purpose of advertising in the first place?
If I'm getting paid to watch McDonald billboard, what are my chances of going in McDonald to buy a cheeseburger?
One thing is advertising on television, where people end up seeing the ads because they are too lazy to change the channel, and another thing is internet advertising, where anyone can install an ad blocker and not see any advertisement. Permission based advertising is the way to get Internet users to continue to see ads and even if they only see them in exchange for tokens, there is a greater chance that they will consume a product after having seen an advertisement, even if it's just for the tokens, that if they don't see any ad.