Everyone has their own way of doing things.
Personally, I'm a member of the oldest PTC/GPT programs.
However, I think it can be smart to be a member of many legitimate PTC/GPT programs.
I don't see how anyone could spend hours at them all.
For many people, I can see it a very good and easy way to earn and to get advertising.
You said 30 so lets take 30 as an example:
1: $50.00+ per month - this one is their tops because they like it the best, do surveys, offers, tasks, and maybe have a couple referrals to boot.
2: $25.00+ per month - this one is not their tops but they have a few referrals, always view the ads, so some offers that they don't do at number 1.
3: $10.00+ per month - another one they don't make a fortune with and only have one active referral....still, they make enough each month for that tenner.
4, 5, 6, 7, 8, 9, 10: $2.00+ per month each - some of these they might have a referral or two but many no refs at all.....here again, they still make duce and some times more, each month.
11-30: $1.00 per month each - these 20 vary a lot because some months they make a buck and some months a little more or a little less....all depends on the number of ads, various winnings, and perhaps a ref activity, not to mention an offer or survey.
Total Monthly Earnings MIGHT be an approximate: $150.00+
Total Yearly Earnings MIGHT be an approximate: $1,800+
In regards to time.....well, I think everyone today knows multi-tasking is.
Of course, that is actually a rather low approximate I have up there. Take someone that is making say three+ times that amount= $500.00 per month and $6,000.00 a year. Not too shabby.