What a load of absolute nonsense. No game will be close to its RTP after that many spins.
I'll give you my videoslots screens as an example of this.
During those spins you mention you could hit a huge win at any point rendering anything above completely meaningless. This is what you have left out. Winning spins are not taken into account in your calculation. Remember it's based on RNG. The percentages vary massively but overall the game is designed, eventually, to reach its RTP. It might give 700% to one player and 10% to another.
Over how many spins is the point? You won't see it after 100 spins is what I am saying. Over billions and billions of spins that will be the RTP, doesn't really make the game play much different.
If you had just stated that Play and Go are robbing piles of crap in the main I would believe it more. RTP differences of 1 or 2 % mean actually very little over say 100 spins. Over 1000000000 spins yes you will see it.
2105 spins on Opal Fruits at £1.50 bet to get a bonus, bonus paid £7.50!!
£10 bet bonus on Rise of Olympus. Paid £10(plus £30 from getting to it)
Tomb of Madness, in general, the game is just a failure of any sense.