“Sponsors are only allowed to distribute the program as designed by the provider.” This statement relates to any invitational activity and does not only refer to content but also to program layout of the accredited activity. It does not make any statement on the ways how the information is disseminated. Thus, you as supporter may e.g. link on the webpage of the provider (not vice versa) or distribute it by (post) mail etc. as long as the entire program is made available to the addressee.