Your service would be fantastic and in high demand if there is no bounty programs for telegram and other channels you mentioned for boost. All bounty hunters nowdays, are required to join the telegram campaign even without being that active. ICOs know can enlarge their communities by just reserving a small percentage for airdrop that require subscriptions in its different channels and even more doing some other promotion tasks. At most cases, you may be hired by an ICO or two but this can't be for a long term because of reasons i mentioned above. I would suggest you to promote your service in other environements (out of ICOs) where startups and campagnies need this kind of boost to reach much more communities.
As you can see, you thread is one week age but no one is interresting despite more than 10 ICOs are published everyday.
May be you should try to contact Marketing managers of ICOs and present your service directly but this will require you to create a profile mentioning your past works and some technical details about your tools.
Anyway, Good Luck