I always felt PooPrint were the worst online slots, the maths more pernicious than even NetBent. This was/is particularly true on their themed 20-liners, the most tedious crappy low-potential online editions ever. This dire game model was hidden beneath a veneer of big-name themes like Top Cat, Worms, Gary the Bastard Gorilla and Austin Powers etc.
This low potential had me thinking back in the day that these are surely just cabinet slots underneath, masquerading as online ones. So it's proven to be. These infest the B3 cabinets nationwide apparently and the toxicity of the coding is made even more malevolent by the 90-94% dog-dirt RTP. Your £300 loss-making session that led you to quit was the best day you ever had on them. It also provided me and everyone else who never played these cabinet £500's with vindication of our decision. As with some Netent games, once you were 50-100x bet behind there was little chance of retrieving the situation on irregular 1-10x bet wins and utterly shite features when you could get one.
When you see games like The Rapist, Cleopatra and Power Fruits converted to B3 they are utterly turd, a parody of the online versions that were good originally. With PooPrint, you have the doom scenario of seeing games that were originally shite online converted to B3 with the inevitable twattings handed out to their players, who are enticed with stupid gamble wheels in desperation to get out of the predictable hole the crapulous RTP & maths lands them in.
On 96% online payouts I thought the Blueprints were good value in terms of entertainment slots, and sometimes you'd get lucky with the 'mega money' feature each of them has which will do a 500x or even 1000x once in a while.
Also they added the Jackpot King progressive to lots of them whilst not nerfing the main payouts (on some of them!) too much, from memory there were a few that maintained a 95.6% RTP (or thereabouts) for the main game with only 0.5% extra for the Jackpot King for a combined RTP of 96.1%. Also the Jackpot King progressive wasn't a 'progressive or bust' style affair, so it could award the round fairly regularly and then just bin you out with a consolation prize of 20-500x. (Unlike Bonanza Progressive, whatever the fuck it's called, where as a small stakes player you basically just never trigger the round.)
Where the Blueprints start to make far less sense is on the pub/arcade cabinets, because now you're in a world where you need to go in on max stakes to get a paltry 92% or even just 90%, £2 per play at 90% RTP is not an edifying experience. (Dare to drop down to the lower stakes and you can be 86% or 84%, along with elements of the game being deliberately nerfed as well.)
Add in the meagre 250x top prize which the games hate to award naturally despite its small size, and yeah, you're not in a great spot.
Ultimately though, if we take the 96% online iterations of them as our baseline, the end result is going to be exactly the same as playing Bonanza. Given a large enough sample size, you'll have lost, on average, 4% of your stake for every time you pressed the SPIN button.
This is why I eventually binned off gambling completely, even at my beloved 3Dice, the absolutely immovable mathematics of the proposition finally got me in the spot where I was just like, 'There's really no reason to carry on doing this, is there?'