Its just another revenue stream that will benefit the "Bottom Line" for the NFL, but the product will not be the same as games played on Sunday or Monday. This is due to two variables, the lack of recovery time for the players, and lack of time to game plan for the coaches. As for the recovery time, I only played High School football, but it took my body 2 full days to recover from a game. Furthermore, towards the end of the season it took my body closer to 3 days to heal. My dad played football at Wake, and he said he took his body 3-4 days to recover from a game. I can not imagine how long it takes for a body to recover in the NFL, let alone how long it takes as it gets deeper into the season (I have heard from Ex-NFL players who knew my dad tell him that the movie, North Dallas 40, is about the closest movie ever made that shows what the players put their bodies through on a week to week basis) . As for the coaches, you basically have 2 days to put together a game plan because there is a chance that you will have travel on Wednesday, if you are the visiting team, but also do a walk through as well.
Personally, I believe the result of last Thursday's game between Atlanta and Tampa Bay was a result of Tampa not having enough time to game plan, as well as lack of recovery time for the players. There have been other games in the past where the score wasn't as bad, but the competition between the two teams was one sided. Another example, a few years ago (I believe it was 2011) Philadelphia played a Sunday night game in New York then had to play IN Seattle on December 1 (Seattle was not good that year, and I believe had a losing record of 7-9) the following Thursday and lost 31-14. However, the score did not indicate the butt whipping Philadelphia took, it looked more like a final score of 49-7. The Philly players just did not look physically ready to play, whether it was the lack of recovery time, the lack of recovery time due to how late in the season it was, or the fact that they played a Sunday night game and then fly across the country 3 days later.
These are just two examples that I can remember off the top of my head. Anyway, my point is that even though the NFL will make plenty of money from Thursday night games, but does this extra profit justify the costs? Aka, the health of the players (How can the NFL say that they are now soooo concerned about player's health and allow them to put their bodies through this type of punishment. I would bet everything that I own that multiple players will get hurt as a direct result of playing on Thursday night due to the lack of recovery time), the quality of the product/game, and finally what if these games have a direct effect on Playoff implications. Does this not jeopardize the integrity of the NFL? For example, lets say its there are two weeks left in the season, and Team XYZ can make the Playoffs if they win their final 2 games. Furthermore, their next game is on Thursday night 1,500 miles across the country against a team that is officially eliminated from the Playoffs . Then Team XYZ loses the game by a FG in the last few seconds. However, if this same game had been played on Sunday, then would Team XYZ have lost by a FG or would the extra time for the players to recover and the coaches to put together a game plan had a direct effect on the final score?