Twitter: how to hook a robot

Since we started the campaign “Is it kosher?” on Indiegogo, I have experimented with different methods of promotion in Internet.
Twitter was a kind of terra incognita and I tried a lot of ways.
I was surprised to learn that there is a bunch of robots, tracking hashtegs in Twitter and might favorite, re-tweet or even follow you, following set trigger.
Here is an example of such twit

Practive shows, that if you want to attract bots, then use the most popular hashtegs in your field. Sounds like Cap, but I didn’t get it at once.
But be aware, that bots won’t bring you lot of visitors and attractions, but the quality of your tweet raises.