into a (commercial) reputation system. If a TA user wants to express a rating about another user (for example, a buyer about a seller, a seller about a buyer), he buys a *rating ticket* from the PCA. The group attribute of the ticket in this special context expresses a value proposition for the rating[, [e.g.]{},]{}an impact factor used by the rating system to calculate weighted overall ratings, as well as an attribution to a particular rating system. The user then formulates the rating and sends it to RS as ticket payload, and charging is executed. The result would be a rating statement about another participant of the rating system which is trustworthy, accountable, but protected as a pseudonym. This enables the resolution of one important problem in reputation systems, namely accountability of users[, [i.e.]{},]{}the possibility to trace back malicious ones and threaten them with consequences. Based on the trusted ticket system, price schedules can be adapted to the requirements of rating systems as laid out above. On the extreme ends of the spectrum are cost-free registration of ratings by PCA, ensuring only accountability, and increasing charges with the number of ratings (or[, [e.g.]{},]{}their frequency). Even reverse charging[, [i.e.]{},]{}paying incentives for 