In my practice, rebuy just helped me to play to the final table. May be i have not enough experience but i never got enough prize to get a profit with rebuy.
No, no, I'm sure you have enough of experience. It happens to everyone: if you do couple of rebuys and you take the last paid place - your profit is negative. Again, I think it's a good practice to do rebuys as rarely as possible.
Yep. May be there are some strategies for using rebuys, and, i think, that there are some opportunities to use it cleverly, but when you have several tournaments the same time - there are no time to analyze situation with rebuys. May be if i lost 3 tournaments that moments and have only one with the last table... But it change all my strategy and it never improves the quality of play. At least in my situation.
Right. Playing at many tables you don't even remember where and how many rebuys you've made already. It's really frustrating when you finish in the paid places, and then you see that because of all those rebuys your profit is actually negative. I think the optimum is one renbuy max, and one table only.
Anyway to test it i need more practice, but i don`t have time for such tests. Logically this is right decision for me, but may be someone makes some notes due tournaments, or use some special software. In such situation they will laugh at me.
Surely so, i tried to make poker my way of income several years ago. I spent 10-12 hours every day playing 4 tournaments one time. It was awful for me. So no more job in poker

Did it not occur to you to choose a poker modality with more variance? Oh, at that time maybe spins would not have come out, otherwise you would have been happy to play them.

The main idea was that i was waiting for nice cards. When i got strong cards, i fold all other tables. Profit grew up fast, but for 3-4 first hours, after that i began to make mistakes. And everything was nice - no one diverted me, no calls, big monitor - ideal conditions. I think that it was interesting experiment, and it is possible to get some profit this way, but you have to modify your game tactics.
Maybe choosing a modality with less variance, with fewer tables, and playing fewer hours would have been better for you. In poker it is very important to control the tilt and what you say has all the ingredients to end up tilted.
I tried different ways, different strategies. The most comfartable and efficient was playing in 4 tournaments. I played using book strategy, so it was easy enough - i easily decided to raise, to call or to fold. With such decisions i was in the game not very often. May be it would be better to decrease hours. Now it doesn`t matter, i tried to get easy money and failed.