IMO this is more of the issue at Newcastle rather than a lack of TPA opportunities.
Again, simple supply and demand economics says no, this is a TPA issue.
I know some seem to struggle with basic economics, so I will try to write a story. If this doesn't work I will see if I can put it in pictures for the very slow.
Lets suppose two teams are rebuilding. We will call them the Steelmen and the Donkeys.
The Steelmen play in a small, working class market. They have no TPA access and cannot spend more than the cap of $6million for their top 25.
The Donkeys have a huge and relatively wealthy RL market all to themselves. They have effectively unlimited TPA access and spend approximately $8.5million on player payments for their top 25.
The Steelmen and the Donkeys have needs at similar positions.
Lets say each team already has 10 "standard" first graders signed up at the "cap average" of $240k.
This leaves the Steelmen $3.6m in "discretionary" spending, and the Donkeys with $6.1m in discretionary spending.
Lets say the market has determined that the "maximum" that an "elite" talent will demand is $1m.
The Steelmen can't pay that for any one player without screwing their cap, so our free agent elite talent signs with the Donkeys, leaving them with $5.1m discretionary spending for 14 players.
There are 9 "quality" players on the market. The market value of these players is 5 x 600 (former rep), 2 x 700k (rep) and 2 x 800k (regular rep), depending on position.
The Donkeys quickly sign the 2 x 800k players, leaving them with $3.5m in discretionary spending for 12 players.
The Steelmen have targeted one of the $700k players as their centrepiece to build the club around and somehow convince him to sign. The Steelmen now have 2.9m left for 14 players.
The Donkeys sign the remaining 700k player and now have 2.8m to spend on 11 players.
The Donkeys then sign 3 of the remaining "former rep" players for 600k a piece, leaving them $1m for their final 8 "squad" players - 4 "development" players on the minimum of $80k, and 4 "contributors" on $170k.
The Steelmen sign the 2 remaining "former rep" players for 600k.
Needing to fill out their roster, and with only 13 players under contract, the Steelmen sign 4 more average first graders on $240k and 1 "contributor" on $170k. They have to fill their squad with 7 "development" players at the minimum of $80k.
Good news, the Steelmen are $10,000 under the cap!
Now the bad news for the Steelmen.
The Donkeys are going to run out for their first game with 4 "top shelf" players and 3 "former rep" players. The rest of their 17 will be "average" first graders. If they get some injuries, they have 4 "contributors" to call up.
The Steelmen are going to run out with 1 rep player, 2 former rep players, and 14 average first graders. If they get injuries, they have 1 contributor in their system before they are chucking kids out there. If any of these kids kick on, the Steelmen are unlikely to be able to afford to keep them, as they are close to the cap, and the Donkeys can better any offer they make by finding another TPA.
Even at their best, the Steelmen don't have the players to trouble the Donkeys.
Posters on LU will then tell the Steelmen they are uncompetitive because their management is shit.