I have contacted some ICANN ac. registrars, asking for drop service, one click utility and so on, her is one answer I have got:
Dear Sir/Madam,
We are not giving one click service, but we do have drop services.
We collaborate on this issue only with our partners under a special
agreement.
We will be happy to discuss a partnership option with you in case you
operate in large quantities.
The volume of 1000 domains/month (total listed domains, not successful)
is the case to set an agreement between us for a cooperation regarding
domains drops.
We have to discuss the mutual interfaces (information exchange) and
prepare it to the most efficient way to get highest success in drops
grabbings.
Our agreement is in general based on fixed monthly fee to cover the
grabbing process plus a fee for succesfully registered domains at
several optional levels.
Please let me know what is your preffered aproach regarding the domains
candidates and drops processing.
Best Regards