I was checking out calyx institute and I believe they were overcharging their services. 4gcommunity.org is also a reseller of Mobile Citizen which runs on Sprint. You have the option of paying semi-annual ($90.00), quarterly ($48.00), or bi-monthly ($36.00) if yearly($168) does not work for you. I'm not a hundred percent sure of the qualifications but they seem to be open to anyone who wants affordable internet. At the very least, I was told families were able to take advantage of this. Essentially, you could be potentially be paying for Unlimited Data at the rate of $14/month. However, I believe you are stuck on the hardware you are given (fuse hotspot). They do not require proof of income. Sprint's service was not good in my area, but 4gcommunity was very detail-oriented in addressing questions!
Edit: now 4gcommunity is offering alternative LTE devices but the subscription price is more but you get access to the Spark/LTE plus Network! You can get a Spark modem (Netgear 6100D, may be better for reception) for $500 and comes with 12 month of service. Thereafter the subscription costs $255(yearly), $132(semi-annual), $70 (quarterly) or bi-monthly ($50.00). Alternatively, you can get the ZTE Pocket Wifi for $410 that also includes 12 months of service with the same subscription cost thereafter as the Netgear 6100D. This is potentially $21.25/month which is cheaper than other ISPs and "competitors" (they are generally limited bandwidth for the same or more price!).
There is now only a 7 day satisfaction guarantee in case things don't work out and you will have to pay for shipping.