This is in line with Frontier's business plan.
To review, back when Ma Bell was broken up in the early 80s, it only affected about 80% of the USA, because the remainder had "independent" telephone companies. Roughly, most places where Ma was not the phone company were rural, or at least used to be rural back when the country was getting wired up for phones. Largest of the "non-Bells" was GTE.
Frontier was an amalgum of several "non-Bells" including Rochester, Citizens, and the original Frontier systems. Verizon was an amalgum of two "baby Bells", holding the Bell areas in the Atlantic coastal states from Virginia northward, and GTE, itself an amalgum of the original GTE and several other "non-Bells", incuding ConTel, with random mostly rural systems in 40 states.
Verizon was thus left with a dominant position in its core states, and rural and suburban systems randomly around the country. After selling out of Iowa, Alabama, Missouri, Hawaii, and the northern New England states in smaller transactions, it packaged it non-core assets (and West Virginia, a slowly dying state) and sold these all out to Frontier.
Frontier wants to be in the POTS (Plain Old Telephone Service) business. That, and DSL, it feels still has a long lifespan in the mostly rural places it does business in. Only a very few systems has FIOS and there is no business return for wiring more for it. Verizion wants to be in the POTS business only in big coastal cites. It sees the future in "content", like FIOS.
Personally, I see logic in what Frontier is doing. There is still life in POTS in rural America. A merger with Century and FairPoint, the other two big rural telephone companies, would create a major communications player.