P2E mean play to earn , thus with playing you can earn. But i learned this can also mean you need have your own invest in it, so next i will divide my games in..
FP2E - free play to earn
PP2E- Pay and play to earn
Invest to earn could be another concept, something I'm already doing at Bitvest. Hasn't always worked out especially last year with some really big winners getting lucky but over the long-term, you know what they say, the house always wins, and overall, am still in profit from 3+ years of calculations;)