DENIC is providing a public service (namely: DNS for the .de TLD) - and *the whole world* wants to reach their DNS servers. (No different to .com and other large TLDs)
OK, DENIC is providing a public service. But DENIC's network is still only serving DENIC itself. RIRs give out address allocations to network operators whose networks are serving many organizations. If DENIC's newtork was serving many organizations and allowing .FR, .SK, .RU and .PE to provide their public services over the DENIC global anycast network, then RIPE should give you addresses to run your anycast network. But if DENIC is not going to serve other organizations then RIPE should not give you the addresses but should tell you to go and find a global anycast network operator to assist you. --Michael Dillon