bummer - I don't have my support page anymore with the new template
I'm talking more about technical details, costs and such only to share in case there are others here at Textkit that want to do online education projects themselves but are unsure of the costs. I have been at this over 10 years and in my 'day job' I do a lot of marketing and technical work around colocation/cloud servers/conversion tracking/phone call tracking. I'm a founding partner at this company here: http://www.mongoosemetrics.com
For Textkit, advertising is way, WAY down but it still covers the costs of a 512MB server and the storage/transfer costs. It's only about $350 a year total and the ads take care of that with a little bit to spare.
I would like to put a donate button up however just to do some fun things we use to do in the past like Ides Of March contests for Amazon.com book gifts.