Guaranteed income for small giant

I think that the devs should offer great deals for leveling up hero’s. For example, offer 10x 1star training hero’s for $(cheap)($2) , etc every one will buy them, so no real advantage to anyone, and incentive to level up other players. At the pace this game evolves, my grand kids will Finish Leveling up my hero’s,
Let’s get some way to level up what we have in a reasonable time, and move on to new hero’s… And S.G. can make some money