gunbj Joined: Apr 11, 2018
• Posts: 57
July 3rd, 2021 at 12:45:28 AM permalink
Hello everyone,

Suppose one is playing a slot machine with 101% RTP.
Bet is \$10 and for every \$10 played you get 1 slot club point. When you've accumulated 2000 points you have the possibility to buy a \$100+\$100 in promo credits (you give \$100 and get a ticket for \$200 in promo credits back).

How does one factor this in mathematically to the overall EV?
Is it the equivalent of a \$100 cashback (\$101 to be correct as RTP is 101%)? So basically a 0.5% cashback? (100/(2000*1)=0.005)?
Or is it to be considered as a matchplay?

Thank you
camapl Joined: Jun 22, 2010
• Posts: 420
Thanks for this post from: July 3rd, 2021 at 1:34:12 AM permalink
Earning 2000 points is the result of \$20,000 in bets. So, including the promo, you�re getting \$20,200 in action for a cost of \$20,100.

\$20,200 / \$20,100 = 100.4975124%

If your base game has a 101% return, then your overall return is as follows:

101% * 100.4975124% = 101.5024876%

This assumes that points are not awarded during play of \$200 promo credits. If, however, points are earned, then this will be slightly higher.
* Actual results may vary.
gunbj Joined: Apr 11, 2018
• Posts: 57
July 3rd, 2021 at 2:45:55 AM permalink
Thank you very much, that makes sense now!
How do multiplier days affect this?

If one plays on x2 multiplier days one needs \$10,000 to make 2000 points for the \$100+\$100.
So you're getting \$10,200 in action for the cost of \$10,100, right?

\$10,200 / \$10,100 = 100.990099%
Total RTP = 101% * 100.990099% = 102% correct?

For 4x multiplier one needs \$5,000 in action for the \$100+100 so:

\$5,200 / \$5,100 = 101.960784%
Total RTP = 101% * 101.960784% = 102.980392%

Am I doing this right? Thanks
camapl Joined: Jun 22, 2010