There are definite trade offs - but you will not see bans often, else anyone can send fake followers and you can get banned - but that's not how it works.
It is correct that i don’t use your service and not have any idea about yours service, but as my opinion for a little mistake user can lost his Twitter account. Twitter rules is very hard and their bot is very active.
True, thank you for your advice for others though. We do not guarantee anything but it is safe enough for many people to use so far.