The strategies to increase the reach in terms of both registered teams and voters in an event or competition are as follows:

1) The major problem in this situation is reaching out to the different colleges and universities for their students to participate in such competitions which in turn helps them in showcasing their talents and improve the brand value of the institution as well. There could be many solutions to this problem: 
(a) Appointing Campus Ambassadors of the respective colleges and providing them the certificate for their good work. They will be provided a layout of the whole process. The top performing CAs can also be awarded some prize money according to the number of participants from their respective colleges. This will help us in having a structured approach towards connecting with the participants. This will help us in trending among the colleges with the help of the network of their students.
(b) Appointing marketing teams according to zones and cities who will contact the different college administrations or the student bodies. This is a more direct approach to the problem as we are directly contacting the participants. This will help us in increasing the efficiency of the process but the cost may vary on the basis of transportation and contacting the different bodies of the institution. 
(c) Creating awareness through social media platforms like Facebook, Twitter, Instagram, LinkedIn etc., YouTube and Google AdWords. This will help us in connecting to a wide network of people all around the country. This will also help in increasing the number of voters for the competitions. We can use web analytics tools like Google Analytics to easily identify what location our website traffic is coming from. On the basis of this analysis, we can target some specific regions of the country.

2) Now, we have to provide the participants with the basic information regarding the competition. We will have to inform them about the whole process of participation, results, prizes etc. There can be two approaches to this step:
(a) Emailing the participants directly and sending the attachments about the whole process with it. This will ensure that everyone gets all the information about the competition. We can also conduct interactive webinars to ensure that participants have no doubts regarding the process.
(b) Sending the pamphlets and posters to be displayed on the notice boards of the respective colleges or informing about the process through the college administration. This is a traditional but effective method to increase the number of participants.

3) We can create hashtags to be attached with the advertisement created by the students. This will help us in trending on social media and we can also track the trending situation about the submissions. We can also create and share some video content to be displayed on the official handles of the competition on various social networking websites. This will also help in increasing the number of voters for the competitions.

4) We can create social media campaigns comprising of challenges by YouTubers, celebrities etc. e.g. Skybags #Bagtheball Challenge, ALS Ice Bucket Challenge etc. This plays a major role in trending on the social media platforms nowadays. We can also use some paid marketing like mentions on twitter by famous pages etc.