You need boots the senders of personal messages and not only (was the order from the collector for mailing threats) and bots for administration, type of auto add news, and products.
Of particular value is the implementation of register VK including the virtual SMS, in some boats it is simply necessary, in the other the availability of such an option is useful and it allows you to login to many sites.
or is it better to focus on the Telegram?
And then, and then, what orders have the and work, even if the order on this subject, only one is still you will gain experience and code, and how much it depends on you, the most devastating is to proceed with the order, and it is in this aspect not very important "Scam" is or refund.
I'm not talking about all sorts of chat-bots, aka <famous person>.
Why not about them?