Martinagle does not work for people like use who have limited money always and the end result is quite obvious that you lose all the money playing that strategy generally. So better not to fall under such things which will put more pressure as you would want to play more and put more money in order to recover your past losses.
Martingale with relation to sports betting is a winning combo as long as you are doing your research. Combining Martingale with hedge betting is an even better strategy to minimize your risk and losses.Indeed, affiliate / referral can be the best way and it is a risk-free way to benefit from the gambling business. But, frankly, it won't be easy to persuade people to play under our affiliate link. Hard work will determine whether we will get more affiliates or not. In addition, special skills are needed in persuading people, which certainly not everyone has that ability.
Getting affiliates for gambling is really tough even if you put in a ton of effort since they have to risk money and won't be doing it consistently obviously which is why you will never consistently through this method. 
Martingale can get risky really fast if you start your bet off with 1k satoshi or 10k satoshi. The (base bet) x 2 every loss compounds very quickly in a losing streak! You must definitely know what you are doing and still it holds a high risk rate. Although a 50/50 chance with a 1% house edge is much more simple than "going for broke" trying to hit a 2 million multiplier on hilo. 