Yeah, that blog post is I think very unhelpfully phrased, especially as Travis’ intention is to migrate builds from travis-ci.org -> travis-ci.com (see this page for details), but they haven’t currently done so (the vast majority of OpenMRS’s use of Travis is on travis-ci.org)
That said, putting some numbers around this: Last month (Oct 6th - Nov 4th) we used 11,861 mins of build job time on travis-ci.org and 1,042 mins on travis-ci.com. (The information I’m using is publicly available; here for travis-ci.org and here for travis-ci.com). AFAIK, we only use Linux builds on Travis.
Depending on what the blog post actually means, we might be ok with just a small credit boost (13,000 credits / yr would cover our usage of travis-ci.com with room to spare) or be in need of quite a large credit boost (closer to 13,000 / mo to cover all of our builds in the Travis ecosystem).