I ordered a community management services in cryptotrafficmarket.com. They works good and helped me to organize my community and help me in telegram.
So you are glad of the results of the provided services. But a lot of depends on the price. Not many clients can afford to spend a lot of money.
The most important for marketing agency to provide such kind of services for cryptocurrency startups that they will be able to collect the necessary sum of money to archive the necessary for them results for the future development.