Viber API and rules?

Question

Viber

There are intermediaries who offer mailing via viber for money, for example, for 50 kopecks. But they somehow, in turn, work with viber directly. Has anyone worked directly, what are the requirements, does the network somehow resist spam?

Answer 1

We were approved for an application to work directly (a small organization for 4 people), although it took time - a month and a half for this somewhere.

Answer 2

Viber works directly only with large players, so if you are not ready to generate at least a six-figure number of messages monthly, Viber will still send to aggregator partners.
Counter spam is arranged as follows: if a certain percentage (not very large) of users clicked the "block" button after receiving the mailing, then the service is blocked. Therefore, it is useless to spam at random numbers - they will quickly block them.