It’s not like they’re taking over a completely defunct shell that used to sell beer nuts. OTC stocks are ripe for the picking especially the ones that have proprietary assets and technologies that bigger companies can use to build on. Less red tape on the OTC and cheaper too, not to mention the offsetting tax implications. Much more to it than what you’re seeing on the surface.
...which states that the resulting company in a reverse merger must trade on an exchange like the OTC for a period of time before listing on NASDAQ.
You can also imagine that, following consummation of the merger, the company will likely begin the process of SEC reporting in order to satisfy the requirements (as summarized in the article from Kaufman & Canoles - link provided above - clearly states that the company must file audited financial statements with the SEC for a "seasoning period" of at least 6 months on “the over-the-counter market, another national securities exchange, or on a listed foreign market.")