Is it safe to buy Telegram members?
Yes, if done right. Years of practice have proved that the risk of getting banned or deleted occurs only if group inviting (adding) is done too fast and aggressively.
We had seen groups to completely disappear (along with creators personal account) when our competition was processing inviting at an ultra speed adding dozens of users per minute to the group.
Victims of such hard group deletion have turned to us, to build the community for them from a scratch and Freegram managed to build solid Telegram communities around their project by taking it at a reasonable pace.