Yup, playing with 0.1$ or 0.2$ is quite common among the gamblers with low portfolio but i don't think there would be any gambler who is willing to deposit less than 10$ at a time. If you ask me, i sometimes deposit even 5$ but it is only on a site that is new to me and I have to test that site.
Other than that, at the casinos that I play regularly, I do not deposit less than 50$ as I know i am a regular player and I would be actively needing that money to place bets.
However, most slot games today have a minimum bet of $0.2, and a $10 deposit to play with a low bet is certainly quite small in my opinion.
I prefer a $0.4 bet because if I'm lucky, it feels more rewarding, and most of my deposits are over $80.
If you want playing for a long time with an $80 deposit with the lowest bet, you'll certainly be satisfied playing slots for hours because you have a large capital and a small bet. However, if you win with a small bet, you're usually less satisfied because you have a large capital but a small bet.It's up to each individual, because to have fun in gambling, no matter how small the bet, it doesn't matter. The goal isn't to achieve high or low amounts, but to achieve enjoyment.