One extremely effective and popular way to reach your audience is to send them a welcome DM as soon as they follow you. This can be easily accomplished with GMT2 using the DM module.
To set this up, open up the DM module and scroll all the way to the bottom where it says Monitor New Followers. Simply enable the option and add as many DM messages as you want. Now when a user follows you, a random DM message will be selected and sent. Spintax is also supported when sending DM messages.
We aren't completely done yet since we still need to set your limits and delays. Scroll to the top of the DM module and set your hour and/or day and/or week limits. This should be within reasonable limits and humanly possible. Next set the amount of users to interact per operation which will tell GMT2 how many new followers to DM at a time, and also set the delay between each individual interaction which is the number of seconds GMT2 will wait between each individual DM to a new follower.
Now that these options are set, we are all set. The DM module does NOT need to be enabled for this feature to work. Users that receive a DM via this feature will be added to a special blacklist that will avoid users receiving multiple welcome DMs.
When your DM limit is reached and you receive new followers, the DM new followers feature will remember these users and as soon as enough time has passed they will receive a DM message.