Is there a charge for using thump? Can I use Glug for free?

In the interactive group established by Glug, in the mode of full staff, if a short message is generated, the group owner needs to pay the short message fee (the notification short message for building the group and adding members is free). In addition, the sender pays for the short messages generated by mass and private messages. If you need to use Glug for free, you can turn off all-staff interaction in the settings of the interactive group. After closing, the system will no longer forward interactive short messages from other members to unregistered members (accordingly, there will be no short message fee). In the group list, turn off the interactive group, and an orange free logo will appear on the right.