I wonder will TM reroll backfire on Niantic

They can sell Raid Passes instead.

You will spend your money in raid passes because it will take you hundred attempts to reroll the move you wanted

I don't think you need to worry about them they will still get their money, they are not gonna go hungry lol

i am just worried that the odds (off good moveset ) will be even worst now

It at least SEEMS like its gonna be a lot tougher earning pokecoins so Niantic will reap the benefit from that as well.

As new Pokémon (gen 3 and later) get added into the game, it will become increasingly difficult to get Rhydon or any specific Pokémon at all. Getting one with good IVs and a good movesets will be especially difficult. The possibility to teach our Pokémon new moves will become a necessity if we're to have a desirable Pokémon.
There are currently 5 more gens not yet introduced in Pokémon Go. I know I'll be hatching eggs hoping to get a good Salamence, Garchomp, etc.
Don't you worry about Niantic's profit, just make sure you complete your dex for each gen before the next gen is added. Or don't, trading is coming sooner or later.
So basically just do whatever your want and have fun!

They will actually make more money.

Gone are the days of collecting 100 coins every 21 hours. Now the Pokémon will bring the coins. When it's defeated from the gym.

Trainers cannot get TMs unless they do raid battles. Trainers cannot do raid battles unless they get a raid pass. Raid passes are limited to 1 per day received from gym pokestops or purchase in store, and trainers can only have 1 in inventory at a time.

Trust me. They will make more money since coins are slower together now and trainers want raid passes to get TM