I enjoyed reading your thread and you make a lot of sense, but I didn't understood a few things, specially on point 3 and 4.
When you are talking about ROI%, I'm assuming your talking about it's overall profit, at least that's how I usually use ROI%. So if a punter has 10% overall profit, it shouldn't matter if he makes more or less bets than a punter making 3% overall profit. Assuming he manages to keep his record, and you follow every tip, then you would be better with the one having 10%, even though he only bet on 2 or 3 games a week.
Seeing ROI% the way I do, I guess that point 4 would not be very important as well. Again, I'm assuming someone would be following every bet offered by the tipster. Some would have high odds, other would have low odds, but in the end he would get those %10 average profit.
Another thing I would find important, would be a trial offering.
hey Fruegaurds , ROI is Return on Investment so when you follow picks for a tipster that has 5% ROI for example you will be expecting to make 0.05 unit everytime you bet
but the volume is so important , so if a tipster has 10% ROI that doesn't mean that he is a better investment than a tipster with 3% ROI
let's take an example , if a tipster with 10% ROI gives 2picks a week and you are betting 100$ on each match you are expecting to make 20 dollars a week
while if another tipster with 3% ROI gives out 5 picks a day you would be making 3 dollars on each match so in a whole week you would make 105$
so the 2nd tipster made you more money since he has a high volume
it's just to clear a point that you should look to both ROI and volume and the higher the volume the better value you get
point 4 is important too , if the tipster is giving higher odds than the available odds then he is lying about his profit and he may not even be profitable
another example : let's say that a tipster gave out 100 handicap picks where he told his followers that the odds for these picks are X2.00
but the followers tried to find these odds for the picks and ended only finding X1.95
let's say the 50 of the picks won and 50 lost , the odds that tipster gave would break even but his followers lost money
on papers the tipster publicly is a break even tipster but in practice he is a loser
so if you see that example you can find that some tipsters may say that they have 3% ROI , but since they are faking the odds they may turn out to be loser tipsters
about the trial for sure it's good when it's available , but the most sites that I saw so far don't offer trial